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27th April 2022

Monitoring HPLC Pump Performance

Why is Flow Rate Important in GPC/SEC?

To obtain reliable data from your GPC/SEC system - each run should be related to a calibration curve obtained by measuring appropriate chromatographic standards. Calculations from GPC/SEC experiments are based on elution volume, which is a product of time and flowrate. As such, knowledge of GPC/SEC flow rate is of paramount importance as it has to be constant over much longer periods of time than with HPLC separations.

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April 20th 2022

Static Light Scattering – a valuable tool for polymer characterisation

Static Light Scattering – a valuable tool for polymer characterisation.

A new technical note provides an informative introduction to Static Light Scattering (SLS) - a technique that leverages high precision photon counting to measure size, molecular weight, and other valuable structural information from synthetic and natural polymers. In addition, the technical note details how Static Light Scattering (SLS) is different from Dynamic Light Scattering (DLS).

Download Technical Note.


April 13th 2022

Versatile Platform for Polymer Analysis

Versatile Platform for Polymer Analysis

Are you looking for a versatile platform to analyse a wide range of polymers, regardless of molecular weight range or solvent? The combination of sensitive detectors in our HK Series GPC/SEC system can deliver accurate, absolute molecular size, weight, and distribution information as well as useful data to derive fundamental parameters such as radius of gyration, concentration, intrinsic viscosity, specific refractive index increment (dn/dc) and second virial coefficient. Each detector in an HK Series GPC/SEC system has independent temperature control to ensure that high levels of precision and reproducibility can easily be achieved from one day to the next.

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30th March 2022

Monitoring HPLC Pump Performance

Monitoring HPLC Pump Performance.

A leading manufacturer of modular #HPLCsystems is using our liquid chromatography flowmeter as a quality assurance tool to provide precise #realtime data on the performance of the HPLC pumps they produce. Feedback from the customer is that they are very happy with the reliability, ease of use and performance of the liquid chromatography flowmeter. In fact, so much so, that they are investigating the possibility of integrating TESTA Analytical flowmeter technology into future HPLC systems to provide users with real time flow data.

Read Report (in full).


March 23rd 2022

Using the flowmeter for mass flow measurement from peristaltic pumps

Using the flowmeter for mass flow measurement from peristaltic pumps.

The flow rate of your peristaltic pump cannot be determined just by the physical dimensions of the peristaltic wheel and tubing or speed of rotation. Other factors including aging of the tubing, the viscosity of the fluid, flow pulsations and back pressure are known to have a significant influence on obtained flow rate. Our realtime flowmeter is being used by a major pharmaceutical company to determine average flow rate as well as peak values of pulsation, thereby enabling selection of the most appropriate setting for any peristaltic pump application. Also, our flowmeter is sensitive enough to detect early stage tubing degradation, helping them avoid unnecessary pump failures.

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March 16th 2022

UV detection kits for process measurement

UV detection kits for process measurement

Polymer and resin formulators and raw material manufacturers often wish to know answers to questions including "How can I set-up my production process", "How do I know if my process is running properly?" and "How can I troubleshoot production problems?". UV detection is a powerful tool that can help solve these problems. Our unique rapid scanning #UVdetector kit, coupled with the possibility of remote flow cells, provides proven high performance measurement technology that can be readily integrated into a wide range of polymer process applications.

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March 9th 2022

Refractive index detector kits for HPLC

Refractive index detector kits for HPLC

Refractive Index detectors are widely used for the analysis of molecules with weak or no UV absorption. Typical applications include sensitive detection of alcohols, sugars, sacharides, fatty acids and polymers. Customizable to your exact needs our compact Differential Refractive Index (DRI) Kit for HPLC offers OEM clients an easy route to create a high performance instrument that gives them a competitive edge.

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24th February 2022

Enhanced Detector Stability Improves GPC/SEC Results

Enhanced Detector Stability Improves GPC/SEC Results

Enhanced Detector Stability Improves GPC/SEC Results. In standard GPC/SEC, after column separation, a concentration detector is typically used to record a signal proportional to the relative concentration of the sample. As most synthetic polymers are not UV active, a Differential Refractive Index (DRI) detector is commonly used for this task. A new technical note investigates how TESTA’s enhanced DRI detector can reduce baseline drift and improve the accuracy of results from any GPC/SEC system.

Download Technical Note.


February 17th 2022

TESTA launch custom chromatography website

TESTA launch custom chromatography website.

For companies considering development of an optimized chromatography detector or instrument to solve an application challenge, improve their competitive position or enter a new market – we have launched custom-chromatography.com. The new site is packed with a wealth of useful information relating to TESTA Analytical’s rapidly growing OEM design, development and manufacturing service, our innovative technologies and happy customers.

Learn more.


February 10th 2022

Interested in Joining the TESTA team?

Interested in Joining the TESTA team?

As a small growing company each person we add to our team must be mentally agile, willing to work hard and be adaptable to our evolving challenges. As a successful developer of new, innovative chromatography detectors and instruments for both end user and OEM customers our field of operation is challenging, but highly rewarding. An unconventional combination of different technical and problem-solving skills is what might lead to a career at TESTA Analytical Solutions.

Apply now


February 3rd 2022

Tasked with characterizing polymers or proteins?

Tasked with characterizing 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.

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27th January 2022

High-precision measurement of liquid chromatograph flow rates

High-precision measurement of liquid chromatograph flow rates

Determination of #liquidchromatograph flow rates has traditionally been a tedious, inexact and manual task. Our Liquid Chromatography Flowmeter changes all this. This compact affordable device can continuously and accurately determine inline flow rates in any mode of liquid chromatography without interfering with the system. Being compatible with #mostsolvents, a wide pH range, and pressures up to 3 MPa (435 psi), it is the perfect tool for high-precision measurement of flow rates ranging from 0.001 to 5mL/min.

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January 20th 2022

Need to make challenging light scattering measurements?

Need to make challenging light scattering measurements?

You may have heard it before - but not all instruments for measuring light scattering are equally capable. Field proven in hundreds of labs around the world the Bl-200SM goniometer system is a precision instrument designed to undertake the most challenging dynamic light scattering and static light scattering measurements. As you would expect from a powerful research grade system the BI-200SM can measure light scattering over a wide angular range (8° to 155°) and offers fine adjustment of measurement angles to 0.01° making centre of rotation measurement easier when aligning cells. Precise repeatable data is ensured by automated heating and cooling of the sample cell using an external recirculating system.

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January 13th 2022

Studying Antibodies with Dynamic Light Scattering

Studying Antibodies with Dynamic Light Scattering

One of the fastest growing classes of pharmaceutically active biologics are antibodies. These highly versatile #proteins are increasingly used in immunoassays, in vaccine production, and as the primary component of a wide array of injectable protein drugs. In all these applications it is essential that antibodies remain intact, and monomeric. Failing to adhere to these strict and exacting standards compromises the processability, activity, and shelf stability of antibody-based products. Dynamic light scattering (DLS) is a powerful technique that can be used to detect aggregation of proteins and determine the size of monomeric protein with a very high degree of certainty.

Download application report


January 6th 2022

Happy New Year – New Chromatography Innovations

Happy New Year – New Chromatography Innovations

For those of you who missed it in the busy run up to Christmas - TESTA has just launched a versatile new generation flowmeter for liquid chromatography applications. If you are looking for an affordable real-time monitor to check the performance of your HPLC, or GPC/SEC pump performance or need precise absolute flow rate calibration data – look no further.

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December 16th 2021

C0-operative research and development project

Healthy motivated staff provide better customer service

Every Friday the staff at TESTA Analytical are invited to participate in a bespoke workout routine with the American Functional Fitness specialist - Eddie Griggs. "There are many studies that link the maintenance of a fit and healthy body to the ability to perform well at work" said Carlo Dessy, CEO of TESTA. He added "Not only do the workouts improve health but they build team spirit and enable us to provide better service to our customers".

Interested in joining the TESTA team?


December 9th 2021

Breaking News – Liquid Chromatography Flowmeter 1.2

Breaking News – Liquid Chromatography Flowmeter 1.2

Flowrate 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 second generation flowmeter comes with a wealth of exciting new features including integration time setting to suit different applications, improved communications data buffering and on-board storage of calibration factors for different solvents. The best non-invasive flowmeter for liquid chromatography applications just got better.

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December 2nd 2021

TESTA team member – introducing you to Jeannette

TESTA team member – introducing you to Jeannette

Drawing upon her strong background in procuring materials and parts, planning and organising production schedules, testing and quality assurance - our Production Manager - Jeannette ensures all products supplied by TESTA Analytical Solutions e.K. are robust, reliable and arrive at your laboratory on-time.

Ask Jeannette a question


November 25th 2021

Fast Access Online Bibliography

Fast Access Online Bibliography

Our ever-expanding #bibliography of informative articles, technical notes and application papers now includes approaching 40 documents. To make it faster for you to access just materials relevant to your work we have re-organised this web page to group together documents to do with #MolecularWeightDetermination, #ParticleSizing, #ZetaPotential and Miscellaneous. This final area includes documents associated with TESTA’s exciting liquid chromatography flowmeter plus our niche technologies.

Why not have a browse or bookmark this web page now.