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April 3rd 2024

Patent granted for revolutionary viscometer design

Patent granted for revolutionary viscometer design.

The German Patent Office has recently granted TESTA Analytical a patent for an advanced differential viscometer design that has the potential to revolutionize GPC/SEC application measurements. The novel viscometer design avoids the use of delicate pressure transducers for detection as used by all instruments currently available on the market. Instead, viscosity is directly derived from an accurate and precise measurement of flow in the two branches of the differential bridge. This patented technique results in a more rugged design eliminating the possibility of pressure peaks that may destroy a sensor. Coupled with outstanding sensitivity, compatibility with almost all solvents used in GPC/SEC and a wide dynamic range, this new design sets a new benchmark for this widely used technique.

Learn more


March 27th 2024

When an off-the-shelf Liquid Chromatography detector just won’t do

When an off-the-shelf Liquid Chromatography detector just won’t do

Whether you need to outsource a standard chromatography instrument or detector development project or find a partner to develop a chromatography product tailored to solve a challenging application, our chromatography product development service is for you. Drawing upon decades of experience, TESTA Analytical has established itself as a respected creator and supplier of top quality, innovative, high performance instrument kits and detectors for liquid chromatography suppliers around the world. We pride ourselves on providing a level of technical and applications support that few companies can match. As a small, dynamic company we maintain the flexibility to not only offer you off-the-shelf solutions but also to develop tailored systems to exactly match your needs. We focus on delivering complete solutions including training and support documentation for your equipment.

Download speciality development services brochure


March 21st 2024

Convenient flowmeter kit for HPLC field service engineers

Convenient flowmeter kit for HPLC field service engineers.

Many thanks to Chromatography Today. They recently reported how the unmatched baseline stability of our DRI detectors, which operate up to 80°C, are the perfect tools for helping unlock challenging GPC/SEC, HPLC and UHPLC separations. In addition the publication reported how a leading European pharmaceutical laboratory is using our Liquid Chromatography flowmeter and software driver to manage data from HPLC instruments with different chromatography data systems in their tightly regulated client-server environment.

Read on


March 14th 2024

Differential Refractive Index detector in the press.

Differential Refractive Index detector in the press.

The baseline signal stability of any liquid chromatography detector is particularly important, as it is a limiting factor in peak determination. Many thanks to LCGC International. They report how detector stability, such as is offered by TESTA’s range of differential refractive index detectors for GPC/SEC, HPLC and uHPLC gains particular importance in high resolution applications where analysis time can be long.

Read more


March 7th 2024

Conformity or calibration - which certification do you require for your Flowmeter?

Conformity or calibration - which certification do you require for your Flowmeter?

Did you know that we offer a choice of certification services to demonstrate the reliability and quality of each and every flowmeter we build and ship to your lab? All flowmeters come with a free Certificate of Conformity demonstrating compliance of each individual device with our published performance specifications. This certification is typically sufficient for any application involving constant monitoring of flow rate. However for labs looking to validate or certify the performance of a pump within its range of operation this requires the use of flowmeters which are themselves validated.

Read on


January 31st 2024

Why should I use TESTA’s flowmeter software driver?

Why should I use TESTA’s flowmeter software driver?

Saving real-time flow rate data with each chromatogram is a valuable aid to enabling total quality assessment of any liquid chromatography system. Based on rc.NET technology, our Flowmeter software driver offers separation scientists a powerful, yet easy to use tool enabling real-time communication with Chromatography data systems, supporting Chromatograph fault diagnostics, and facilitating integration with Laboratory Information Management Systems (LIMS). This software driver, operating in conjunction with a TESTA Liquid Chromatography Flowmeter, empowers lab users with tools to continuously monitor, control, and integrate flow rate and chromatographic data effectively.

Learn More


January 24th 2024

Leverage our technological I.P to create winning products.

Leverage our technological I.P to create winning products.

Our history of continuous investment in research and development has resulted in a steady stream of innovative chromatographic technologies able to solve new and challenging problems. Notable developments include our unique Viscometer/Differential Refractive Index combination detector which offers unmatched sensitivity and resolution plus a high-performance rapid scanning UV detector which offers the widest dynamic range of any UV detector currently available. In the last two years our development of non-invasive real time flow monitoring technologies for calibrating and validating liquid chromatography performance has been creating a real buzz amongst separation scientists. Want to know more about leveraging our technological intellectual property (IP) to help give your next generation product a competitive advance?

Learn More


January 17th 2024

Flowmeter package offer

Flowmeter package offer.

Offering extremely accurate, sensitive, and high-resolution measurement of flow in real time – TESTA flowmeters are the perfect non-invasive monitoring tool for a growing range of liquid chromatography applications. For the first 100 days of 2024 – we will include free-of-charge our powerful flowmeter software driver (normal price – Euro 595) with every new Liquid Chromatography or Micro flowmeter purchased. Operating via your Chromatography Data System this software driver enables you to acquire and save real-time flow rate data with each chromatogram to validate the performance of your HPLC, uHPLC, GPC/SEC or LC/MS system and its compliance with the operating protocol you are using.

Request Discount Voucher.


January 10th 2024

Continuous validation of HPLC performance in a regulated environment

Continuous validation of HPLC performance in a regulated environment.

Our flowmeter software driver for chromatography data systems has successfully passed extensive testing in a leading European pharmaceutical laboratory. Managing a diverse range of different HPLC instruments with different chromatography data systems - the pharmaceutical lab was delighted how the software driver enabled easy acquisition and traceable logging of flow data from all its liquid chromatographs. In addition, they found that saving real-time flow rate data with each chromatogram is a valuable aid to enabling total quality assessment of their HPLC and UHPLC systems.

Read report in full.


January 2nd 2024

GPC / MALS unravels properties of nanomaterials.

GPC / MALS unravels properties of nanomaterials.

A new scientific paper, co-authored by our MD – Carlo Dessy, describes how a TESTA multi-detection gel permeation chromatography / size exclusion chromatography (GPC/SEC) system including multi-angle laser light scattering (MALS) and advanced DRI-Viscometer Combination Detector, has been applied to monitor radiation-induced synthesis of internally crosslinked nanostructures from poly(acrylic acid) (PAA). The spectacular results demonstrate that this modern tool yields a more detailed picture of reaction mechanism and product structure than other techniques used to date and opens the way for the tailored design of new PAA nanomaterials.

Read paper in full.


December 20th 2023

Do you characterize polymers or proteins?

Do you characterize polymers or proteins?

If you are looking to quickly and accurately determine absolute molecular weights of proteins and polymers, then look no further! Our BI-MwA Multi-Angle Light Scattering (MALS) system has the highest performance/price ratio of any light scattering detector used for molecular weight determination. Using the system allows you to eliminate SEC/GPC column calibration and improve your data quality.

Learn More.


December 14th 2023

Festive Greetings

Festive Greetings

As we look back upon the past year, the team at TESTA Analytical would like to acknowledge all the customers and supply partners who have helped us develop our business. Thanks for a great year, enjoy some time off with family and friends, and we wish you all the best as you embark on the new year ahead.

Highlights from 2023.


December 7th 2023

IQ/OQ/PQ services for particle sizing.

IQ/OQ/PQ services for particle sizing.

Recently audited by a major pharmaceutical lab - TESTA Analytical offers a complete portfolio of validation services including IQ/OQ/PQ (and if required MQ), for all users of NanoBrook Series particle sizing and zeta potential instruments operating under 21 CFR 11 regulations.“

Learn More


November 30th 2023

Comparing techniques for flow rate measurement in Liquid Chromatography.

Comparing techniques for flow rate measurement in Liquid Chromatography.

To assist both novice and expert chromatographers, we have written a technical paper that provides an introductory background to the different flow rate monitoring techniques and seeks to explain, the value of measurements achievable with each method. With this information our aim has been to provide an independent, informed interpretation of the flow rate monitoring results and how this might lead to higher confidence in performance validation of your HPLC, UHPLC, GPC/SEC or Ion Chromatography systems.

Download Technical Paper.


November 16th 2023

Solutions for Separation Scientists

Solutions for Separation Scientists

Many thanks to LCGC magazine. They recently reported how by eliminating the fundamental drawback of the traditional online viscometer design, the known ‘sample breakthrough’ after each measurement, our COMBO-ONE Viscometer / DRI dual detector allows much more rapid sequencing of GPC/SEC samples.

Read online publication.


November 9th 2023

Improve your #HPLC data integrity

Improve your #HPLC data integrity.

Chromatography data systems are widely used in labs around the world because they include functionality that enables timesaving in analysis, interpretation, and reporting workflows. Including real-time flow rate data with each chromatogram you collect is a valuable aid to achieving total quality assessment of any HPLC, UHPLC, LC/MS or GPC/SEC system. Learn more about our powerful new software driver that allows control and collection of data from any TESTA Analytical AB-4XXXX Series liquid flowmeter using a chromatography data system (CDS).

Click here.


November 2nd 2023

New intern starts at TESTA.

New intern starts at TESTA.

We welcome Karolina Pietrucha, a nanotechnology graduate from Lodz University of Technology (Poland) as an intern at our company for the next four months. The internship has been established in the framework of the EU Erasmus+ programme. Asked about her new internship Karolina said “I‘m really happy to be part of the supportive and professional team at TESTA. It’s a great opportunity for me to gain real working experience.“

Interested in work experience?


October 25th 2023

Continuous monitoring of flow in liquid chromatography systems

Continuous monitoring of flow in liquid chromatography systems.

Constant flow of solvent through a liquid chromatography system is of paramount importance, as results obtained can be distorted by unexpected changes in flow rate. A new presentation discusses traditional methods of flow monitoring and introduces and demonstrates the advantages of a non-invasive, real-time liquid chromatographic flow monitoring technique developed by TESTA Analytical.

Read presentation.


October 17th 2023

Double your GPC/SEC sample throughput

Double your GPC/SEC sample throughput

Viscometer detectors for GPC/SEC, based on four matched capillary tubes arranged in a manner analogous to a Wheatstone bridge, have been around for over 30 years but have operational and performance shortfalls. By eliminating the fundamental drawback of this traditional viscometer design, the known ‘sample breakthrough’ after each measurement, our COMBO-ONE Viscometer/DRI dual detector allows much more rapid sequencing of samples. The result of our design innovation is to increase the total daily throughput of a GPC/SEC System by a factor of two.

Learn more.


October 11th 2023

Want to monitor (ultra) low liquid flows?

Want to monitor (ultra) low liquid flows?

Instrumental techniques including LC/MS, uHPLC, micro reactors, dosing and microfluidic systems all require delivery of liquid flows in the microlitre to nanolitre range. Until now few options were available to accurately monitor in real time such ultra-low liquid flows. Optimised to operate over the flow range 0.001 to 80 µL/minute, with a high resolution of 1nl / minute, our µFlowmeter is a non-invasive device proven to continuously monitor ultra-low liquid flows thereby helping ensure the reliability and the precision of the instrumental techniques they serve.

Learn more.


October 4th 2023

US paper discusses how gases impact pump performance.

US paper discusses how gases impact pump performance.

Peristaltic pumps are commonly used tools for precisely delivering liquids (solvents and reagents) to HPLC, GPC/SEC, flow chemistry and liquid dosing systems. An article recently published on the website of respected US publisher – Lab Manager describes a set of experiments performed by TESTA Analytical that illustrate how dissolved and undissolved gases can affect peristaltic pump performance and strategies to address these issues.

Read article.


September 27th 2023

Enthusiastic response from Chinese scientists

Enthusiastic response from Chinese scientists.

For the first time – TESTA Analytical products were shown at BCEIA Beijing – China’s premier trade fair and conference for instrumental analysis in 2023. Local area manager – Aizhen Niu commented "Throughout the exhibition we had constant traffic to our stand, scientists were amazed at the performance of our real-time liquid flowmeters as well as showing considerable interest in our high-performance detectors for HPLC and GPC/SEC. Visitors commented on the excellent product quality plus appreciated TESTA's commitment to local technical and application support".

Ask Aizhen a question.


September 20th 2023

Win 1 of 20 flowmeter valets

Win 1 of 20 flowmeter valets.

For users of our popular AB4000X range of flowmeters – we have developed a 3D printed stand to keep your device secure and lab space neat and tidy! The sturdy Flowmeter Valet allows you to securely position your flowmeter such that your flow monitoring results remain highly reproducible. To celebrate the launch of this nifty accessory we are offering 20 units free of charge to existing TESTA flowmeter users.

Enter the prize draw.


September 13th 2023

Combination MALS / DRI detector in the Press.

Combination MALS / DRI detector in the Press.

Many thanks to SCIENCE magazine. They recently reported how our COMBO-TWO detector allows researchers to quickly and simply obtain highly accurate and reliable MALS and DRI data. This unique detector is the perfect combination detector package for more demanding Gel Permeation Chromatography (GPC/SEC) applications.

Read May 4th issue.


September 6th 2023

Understanding different approaches to Dynamic Light Scattering

Understanding different approaches to Dynamic Light Scattering.

At first sight, goniometer based and enclosed light scattering instruments look vastly different in terms of the bench space they occupy. A new technical article discusses some of the key details and differences between these two approaches to Dynamic Light Scattering (DLS) which might not be immediately obvious to someone interested in learning more about the topic.

Read article.


August 24th 2023

Instruments and detectors optimized for GPC/SEC

Instruments and detectors optimized for GPC/SEC.

Gel Permeation Chromatography is a powerful technique for determination of fundamental parameters of synthetic and natural polymers ranging from Molecular Weight right through to structural information about branched macromolecules. Unlike many other suppliers, our equipment is specifically designed for polymer characterization and is therefore optimized to operate with all solvents used in GPC/SEC. This includes even the most challenging solvents such as DMF, HFIP, DMAc and DMSO as well as more common solvents like THF and aqueous buffers. Our GPC/SEC range includes top performance MALS and Viscometer detectors and a unique Refractive Index / Viscometer combination detector which sets a new performance benchmark for structural investigation of complex polymers.

Learn more.


August 16th 2023

Custom detectors for liquid chromatography

Custom detectors for liquid chromatography.

Drawing on decades of experience, we have created an expanding range of high-performance HPLC, uHPLC and GPC/SEC detectors, pumps, accessories, and software products that can be customized to meet the exact needs of liquid chromatography manufacturers. Our team of knowledgeable technical and engineering staff, based here in Germany, are available to discuss your OEM needs and to provide seamless integration of our technology into your existing or new product.

Want to know more?


August 9th 2023

Informative introduction to Liquid Chromatography flow monitoring.

Informative introduction to Liquid Chromatography flow monitoring.

A new online presentation compares and contrasts the shortfalls of conventional flow monitoring technologies with the proven advantages of our AB4000X series Liquid Chromatography flowmeter. Details of how this sensitive real-time device can be used to determine just how constant flow from your HPLC or GPC/SEC pump really is are provided. Further information is included on other liquid chromatography applications benefiting from this affordable, easy-to-use device.

Review presentation SOP.


August 2nd 2023

Pump problems with gas bubbles.

Pump problems with gas bubbles.

Many thanks to the editorial team at LaborPraxis for recently publishing our article – ‘Danger recognized, Danger averted.’ The enemy of peristaltic pumps are gas bubbles. In this German language article, you will find out what influence dissolved and undissolved gas has on the performance of these pumps and thus on HPLC, uHPLC and GPC/SEC systems and what can be done about it.

Read article.


July 26th 2023

How to improve your polymer characterisation.

How to improve your polymer characterisation.

Gel Permeation Chromatography (GPC) is widely acknowledged as one of the most useful characterization methods able to provide a complete picture of the natural or synthetic polymer sample under investigation. A new technical note describes how the design of TESTA’s unique Differential Refractive Index (DRI) detector has been improved to provide reduced baseline drift and thus improve overall GPC system performance improving accuracy of results.

Download tech note.


July 19th 2023

Validating pump flow to liquid chromatographs

Validating pump flow to liquid chromatographs.

We have developed a new software tool for our AB4000X range of flowmeters to enable labs to automatically validate pump flow to liquid chromatographs and flow chemistry systems. Using this powerful new software tool - all data and parameters are automatically validated for fitness of use for validation and a summary report generated which can be printed for hard copy documentation.

Learn more.


June 12th 2023

How to use your Flowmeter as a monitoring device.

How to use your Flowmeter as a monitoring device.

A new Standard Operating Procedure (SOP) is available detailing how to use your TESTA flowmeter as a liquid chromatography monitoring device. Flow rate is one of the most important parameters in any liquid chromatography system. It determines retention time or volume and therefore has a major influence on reproducibility. Our popular liquid chromatography flowmeter has set a new standard for non-invasive measurement of flow rate in HPLC, uHPLC and GPC/SEC systems. This new SOP was written to take the guesswork out of day-to-day flowmeter operation and help ensure that all users can get the most out of this real-time monitoring device.

Download Flowmeter SOP.


July 5th 2023

TESTA Analytical records 1000th social media follower.

TESTA Analytical records 1000th social media follower.

Just 5 years ago we started building a thriving social media community. Since May 2018 - we have set about regularly posting new and informative content relevant to the liquid chromatography market that we serve. We are delighted to say that in June we reached our landmark 1000th follower. Thanks to all of you in our social media community for following us on LinkedIn, Twitter, Facebook and Instagram. To help build our community further we’d be delighted if you would share some of our posts with your fellow separation scientists.

Learn more.


May 28th 2023

5 reasons to choose TESTA as your OEM development partner

Creating a better differential viscometer

Used as a GPC/SEC detector to determine the specific viscosity of a polymer or protein in solution - differential viscometers have been around for decades and have demonstrated their value in numerous applications. The R&D team at TESTA Analytical has improved the original 4-capillary bridge design and created a new generation differential viscometer with exceptional performance and operational advantages.

Read on.


June 21st 2023

Reliable quantitative LC/MS

Reliable quantitative LC/MS.

LC/MS is a powerful and widely used analytical technique. However, variation in liquid sample flow to your LC/MS system can invalidate quantitative determination of analytes. Operating over the flow range of 0.001 to 80 µL/minute, with a resolution of 1nl / minute, the TESTA µFlowmeter is the perfect tool for continuously monitoring LC/MS liquid flow thereby providing information to improve the reliability of your quantitative analyte determinations.

Learn more.


June 14th 2023

Application note: Direct determination of protein molecular weight

Application note: Direct determination of protein molecular weight.

Size-exclusion chromatography (SEC) has traditionally been the ‘go to’ technique for the determination of molecular weights of proteins. However, its usefulness is limited by the time-consuming requirement for calibration of the SEC columns with standards comprising proteins of known molecular weight, but which may not be of the same chemistry as the unknown protein. In a new application note we demonstrate how our Bi-MWA detector enables the determination of the molecular weight of carbonic anhydrase, under standard chromatographic conditions, without column calibration.

Download Application Note.


June 7th 2023

Preparative HPLC users – apply now to beta test our new flow monitoring devices.

Preparative HPLC users – apply now to beta test our new flow monitoring devices.

TESTA Analytical flowmeters are widely used in analytical chromatography labs as monitoring tools providing continuous measurement of pump performance. We intend, later this year, to launch a new range of Semi-Prep and Prep flowmeters to help chromatographers, using high flow systems, undertake their preparative tasks in a more productive and reliable way. As part of our pre-launch testing, TESTA Analytical is inviting current users of high flow rate preparative HPLC systems, to apply to enter our Beta test program and be among the first organizations to appreciate the value of flow monitoring in Prep Chromatography.

Apply now.


May 25th 2023

Liquid chromatography flowmeter – continuous quality assessment.

Liquid chromatography flowmeter – continuous quality assessment.

The quality of analytical data is often determined by periodic checks of a set of measured parameters. This unfortunately only gives you a snapshot of how your analytical instrument is performing at a point in time and cannot assure the total quality of an application. To fill this need, TESTA Analytical Liquid Chromatography flowmeters are used in analytical labs worldwide as monitoring tools continuously measuring the performance of liquid chromatography pumps. Through real-time monitoring of your liquid chromatography system, our flowmeters generate a constant stream of data which can be easily correlated to a particular chromatogram, thus achieving true total quality assurance of your application.

Request new data sheet


May 18th 2023

Experienced US technical consultant joins TESTA team

Experienced US technical consultant joins TESTA team.

We are pleased to announce that technical lab consultant - Michael (Mike) Drenski has joined the TESTA team to support our business in North America. Mike’s first assignment will be to help US customers upgrade the firmware of their liquid chromatography flowmeters and to calibrate them according to our Standard Operating Procedure. Prior to joining our team, Mike served as co-founder and CTO of Fluence Analytics, a manufacturer of systems enabling manufacturing and R&D process optimization. Mike has also worked as the Director for Instrumentation at Tulane-PolyRMC, an R&D centre which is active in fundamental and applied polymer research. Mike holds a B.S. in Physics from Youngstown State University and an M.S. in Physics from Tulane University.

Learn more about our support services.


May 11th 2023

Upgrade your flowmeter – free of charge

Goniometer alignment – critical for high performance light scattering.

Goniometer systems have for many years been the ‘go to’ research tool when labs are challenged by demanding static and dynamic multi angle light scattering applications. Many of these systems supplied by us, and our partner – Brookhaven instruments, have been operating for decades without problems. However, the extraordinary results achievable with these systems is based on perfect optical alignment and flawless operation of all components. It is therefore advisable occasionally to strip down your system and re-align it from scratch. During this operation you have a terrific opportunity to check all system components for wear and aging and replace if necessary. TESTA Analytical is internationally respected for its goniometer system expertise and our ability to provide on-site re-alignment services.

Goniometer realignment service.


May 4th 2023

Why choose a Rapid Scanning UV detector rather than a Diode Array UV detector?

Why choose a Rapid Scanning UV detector rather than a Diode Array UV detector?

The UV detector is one of the most used chromatography detectors today because of its reliability, ease of use, and universal response to chromophoric compounds, including most pharmaceuticals. The advantages of using a Diode Array UV detector for analytical HPLC are well documented. However, for applications that involve delicate samples, the high UV energy output of a Diode Array UV detector can be a disadvantage. For such applications, a detector which does not apply the full UV energy load to the sample the whole time is a better alternative. The TESTA Analytical Rapid Scanning UV detector is such an alternative. Capable of measuring the absorption signal for up to 4 wavebands simultaneously, our Rapid Scanning UV is the perfect detector for applications involving thermallylabile samples.

Learn more.


April 27th 2023

5 reasons to choose TESTA as your OEM development partner

5 reasons to choose TESTA as your OEM development partner

If you are looking to develop a high-performance liquid chromatography detector - here are 5 reasons to choose TESTA Analytical as your OEM development partner:
• Decades of experience of HPLC and GPC/SEC technologies and applications
• A track record of major chromatography detector innovations.
• We are an independent company, not linked to any chromatograph company.
• All our developments are backed by a team that delivers reliable products.
• Our ability to understand not only technical requirements but also market necessities and build cost targets.

Want to know more?


April 20th 2023

Considering development of a new chromatography detector?

Considering development of a new chromatography detector?

Did you know that TESTA Analytical is the name behind a growing number of market leading HPLC and GPC/SEC systems? With decades of chromatographic expertise and knowledge, TESTA Analytical has proven itself as a pioneering developer and OEM supplier of differential refractive index, viscometry, rapid scanning UV-visible, dn/dc, flowmeter and gas bubble detectors that set new standards for performance, stability and reliability. To learn more about what makes us a great OEM design and development partner.

Download our OEM services brochure.


April 13th 2023

Upgrade your flowmeter – free of charge

Flowmeter FAQ 5

Q: I noticed that my TESTA #flowmeter shows negative flow rate values. How is this possible?

A: our flowmeters are by design bi-directional. This means that they can measure the flow in both directions. If the displayed is negative, then your device is incorrectly connected in reverse to the designed direction of flow. Please note the negative values are valid measurements but not calibrated.

Learn more.


April 6th 2023

Ensuring the accuracy of your dispensing system

Ensuring the accuracy of your dispensing system.

Dissolved gases are well known to have an impact on the performance of reagent dispensing pumps. A common solution to address this problem is to install a vacuum degasser on the inlet side of the pump. However undissolved gas bubbles pass through largely unaffected by the degasser which can lead to unreliability in dispensing volumes. Several companies are now using our Solvent Line Monitor to detect undissolved gas bubbles in real-time. The digital output from the device detecting an undissolved gas bubble is being used to stop the dispensing pump before it can affect dispensing #accuracy.

Learn more.


March 29th 2023

Looking to give your liquid chromatography system a competitive edge?

Looking to give your liquid chromatography system a competitive edge?

An optimised separation is often considered to be the defining quality of an HPLC, UHPLC, GPC/SEC, Ion Chromatography or FPLC system. High performance separation alone however does not supply answers, it just creates the correct preconditions whereby an optimised chromatography detector is able to reveal the 'secrets' of your sample. The question is, when designing a new liquid chromatography system, should you create this detector technology in-house or partner with an external company that specializes in designing and manufacturing instrument or application optimised liquid chromatography detectors?

Read interview in full.


March 23rd 2023

Introducing the COMBO-ONE

Flowmeter FAQ 4

Q: Testa Analytical flowmeters are small devices which fit neatly in the palm of a hand. However, in which orientation (vertical or horizontal) is it best to operate the device?

A: The best operating position is undoubtedly upright with the display readable. This is the "designed"”" orientation. However, TESTA flowmeters will work in any orientation with minimal effect on the measured flow rate. As such, we recommend that you choose an orientation, and keep it constant in order to obtain reproducible results.

Learn more.


March 15th 2023

Upgrade your flowmeter – free of charge

Upgrade your flowmeter – free of charge

New version 1.5.0 firmware for our real-time flowmeters (liquid chromatography, chemistry and µFlowmeter models) is now available. This new firmware includes facility to store calibration data and a range of other parameters. TESTA Analytical offers all existing users a free firmware upgrade of their flowmeter plus a 3-point validation measurement certifying their upgraded device. Apart from shipping costs to and from our HQ in Germany, no charge will be made to the client.

Upgrade your flowmeter now.


March 8th 2023

Are you looking to monitor a high temperature process?

Are you looking to monitor a high temperature process?

A new remote flow cell / rapid scanning #UVdetector device is available in different configurations to enable you to monitor analytical to preparative scale processes at temperatures of up to 210⁰C. This innovative device enables highly accurate remote UV measurements to be made on #hightemperature process samples that would make direct spectroscopic measurements almost impossible.

Learn more.


February 23rd 2023

TESTA Chemistry Flowmeter

Flowmeter FAQ 3

Q: I am using a TESTA flowmeter to optimise liquid reagent delivery by my flow chemistry system. I detect huge difference between the flow rate I set on the system pump and the measured value obtained by the flowmeter. Is my flowmeter defective? A: No, the flowmeter is doing exactly what it was designed for. Most flow chemistry pumps are optimized around a single flowrate value and for a particular solvent. If you deviate far from this optimization point and use a different solvent, this can result in a notable deviation between the real flow rate and the set value. However, this is exactly why a flowmeter is an absolute necessity for improving the reproducibility and yield from your chemical reactions. Our chemistry flowmeter supplies the real current flow rate of liquid reagents being added and shows also what fluctuations occur at a particular setting. Knowledge of this will allow you to optimise your flow chemistry reaction accordingly and even to select pumps better suited for your application.

Learn more.


February 16th 2023

Flowmeter FAQ 2

Flowmeter FAQ 2

Batchmode determination of molecular weight remains a tried and trusted method in many polymer and protein labs despite the availability of newer chromatographic methods. The reason for this is that batch measurements, like those performed with a research grade goniometer system, are far more accurate than chromatographic methods which can be impacted by variability in a larger number of parameters.

Learn more.


February 9th 2023

Introducing the COMBO-ONE

Introducing the COMBO-ONE

This unique Viscometer - Refractometer combination detector sets a new standard for the detection of intrinsic viscosity of highly diluted GPC/SEC samples. The Refractometer is an integral part of the viscometer, therefore both concentration and viscosity are measured at the same time on the very same sample segment.

Learn more.


February 2nd 2023

TESTA goes greener

Solvent Line Monitor in The Press

Many thanks to SCIENCE magazine. They report how the #SolventLineMonitor is a great #monitoringtool able to detect when a pump solvent reservoir serving your #HPLC system is empty and automatically shut off the system. Your HPLC running out of solvent can lead to loss of data, system downtime and the need to re-run samples.

Read January 13th issue.


January 26th 2023

Why use multi detector GPC/SEC?

Why use multi detector GPC/SEC?

Using a multi detector GPC/SEC system can drastically expand what is possible in terms of polymer or protein structural analysis. The unsurpassed combination of Molar Mass and intrinsic viscosity data, determined at the same time, allows accurate calculation of Mark-Houwink parameters which in many cases provides a good understanding of chain flexibility and density. When the structure model of the macromolecule under study is known, the very same data also allows determination of branching parameters.

Learn more.


January 19th 2023

Why batch mode molecular weight determination still matters

Why batch mode molecular weight determination still matters.

Batchmode determination of molecular weight remains a tried and trusted method in many polymer and protein labs despite the availability of newer chromatographic methods. The reason for this is that batch measurements, like those performed with a research grade goniometer system, are far more accurate than chromatographic methods which can be impacted by variability in a larger number of parameters.

Learn more.


January 12th 2023

Chemical reactions – the importance of accurate flow measurement

Flowmeter FAQ 1:

Q: My #liquidchromatographyflowmeter offers 5 possible integration times, which should I select?

A: For most HPLC or GPC/SEC applications, selecting 1172 msec #integrationtime ensures that any pump pulsation or transient flow spikes will have minimal impact on your measurement. Using this setting will provide an accurate measurement of the average flow rate providing you with a reliable evaluation of your system’s performance. Shorter integration times should be selected if you are looking to troubleshoot a problem with your liquid chromatography system as it allows you to pinpoint the source of flow fluctuation.

Learn more.


January 5th 2023

TESTA goes greener

TESTA goes greener

To further enhance the 'green credentials' of our popular Flowmeter range we have introduced new recyclable packaging for these popular products and removed all previously used plastic bags. Now you can undertake real time flowmonitoring of your liquid chromatograph or flow chemistry reagent pump and still be kind to the environment.

Latest news.


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