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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.


December 21st 2022

Happy Holidays

Happy Holidays

Christmas is fast-approaching, and we hope that you will be able to take some well-earned time off to spend with your family and friends. We would like to take this opportunity to offer our thanks, and best wishes for 2023, to the most important people to TESTA Analytical – our customers, suppliers, and employees.

Latest news


December 15th 2022

Removing inter-detector delay improves triple detection GPC/SEC

Removing inter-detector delay improves triple detection GPC/SEC.

Triple detection GPC/SEC is a tried and trusted technique for determining structural information about investigated samples, and to do this without the need of any calibration or reference material. Often, structure information can be expressed in terms of the Mark-Howink coefficients Alpha and K, which allow rapid comparison of structural properties of materials without the need for branching calculations which tend to be tedious and can be prone to error. However, the exactness of any structure related evaluation puts high demands on the accuracy of the measurements and especially on the set-up of GPC/SEC detectors to minimize inter-detector volume delay. Our COMBO #DRIViscometerdetector, with its unique zero delay design, is the perfect match for any MALS detector creating a triple detection GPC/SEC system of unmatched performance.

Learn more.


December 7th 2022

Chemical reactions – the importance of accurate flow measurement

Continuous monitoring vs scheduled validation of HPLC Pump flow.

To ensure the quality and reliability of your HPLC system data it is important to validate the performance of your HPLC Pump on a regular basis. Some labs choose to do this using scheduled pump flow measurements maybe once a month. However, this type of intermittent performance validation offers only a single data point, and many separations might be run between validations before an error condition is revealed. Continuous monitoring, which is very easily realized using a TESTA Liquid Chromatography Flowmeter, allows continuous determination of flow therefore providing validation of each and every separation run with your HPLC system. This non-invasive device is proven to offer a highly reliable quality assessment of real time liquid flowdata from any HPLC, UHPLC, Ion-Chromatography or GPC/SEC system.

Learn more.


December 1st 2022

The importance of understanding pump flow

The importance of understanding pump flow

Pumps are one of the most common tools enabling liquids to be moved, delivered, and pushed through a separation column, supplied as a dose or transferred from one container to another. A recently published #technicalarticle written by TESTA Analytical demonstrates and discusses the factors that can affect the flow of liquid delivered by pumps used in a laboratory for analytical purposes such as chromatography, and for lab-level flow chemistry applications.

Read article.


November 24th 2022

Exceptional Refractive Index detector stability

4 reasons why you should use a Solvent Line Monitor

If you are a user of HPLC, uHPLC or GPC/SEC equipment then our affordably priced Solvent Line Monitor device can offer you some great benefits by automatically monitoring:
• To shut down your pump if a solvent reservoir runs dry.
• To stop your system if piston pump backflush is detected.
• To detect cavitation of solvent in pump tubing.
• To alert you when bubbles build up in your pump tubing.
The Solvent Line Monitor not only ensures reliable results but it also takes care of your chromatography systems freeing you to perform other tasks.

Learn More


November 17th 2022

Advanced light scattering consultancy & training.

Advanced light scattering consultancy & training.

Our Managing Director - Carlo Dessy has been invited to the King Abdullah University of Science and Technology (KAUST) in Saudi Arabia to perform an upgrade on their 200SM light scattering goniometer system. During his visit – Carlo will also provide expert advice and training covering all aspects of advanced static and dynamic light scattering techniques for challenging research applications. Founded in 2009, KAUST is renowned for advancing science and technology through distinctive and collaborative research.

Learn more.


November 10th 2022

Chemical reactions – the importance of accurate flow measurement

Chemical reactions – the importance of accurate flow measurement

Accurately measuring the rate of addition of liquid reagents is a critical consideration for many laboratories undertaking batch or flow chemistry reactions. When dispensing expensive chemicals or other fluids into a reaction, labs must ensure the right amounts are added as part of quality control. Without accurate flow measurement, too much or too little chemical can be injected into a reaction, resulting in adverse outcomes, expensive reagent overuse and safety issues. In fact, inaccurate flow measurement can mean the difference between profits and lost revenue.

Learn more.


November 3rd 2022

Why is precise dn/dc measurement important?

Why is precise dn/dc measurement important?

Light scattering is a trusted detection method for measuring molecular weight and therefore a widely used tool for analyzing biopolymers, polymers and proteins by GPC/SEC. One of the most important parameters to ensure top quality light scattering data is the refractive index increment (dn/dc). Accurately determining the dn/dc value is vital because it is the link that translates raw refractive index data into sample concentration. The most accurate method of determining dn/dc is to use a stand-alone batch instrument, such as our HK series differential refractometer, and to take measurements at different concentrations.

Learn More.


October 27th 2022

Exceptional Refractive Index detector stability

Exceptional Refractive Index detector stability

Recent technical developments on our popular Differential Refractive Index detector (DRI) now enable impressive stability right after power up. Unlike other DRI’s on the market, the HK Series DRI reaches perfect stability and drift close to zero in under 10 minutes after being switched on, independent of flow. Why wait for top quality HPLC or GPC/SEC refractive index detection results?

Learn More.


October 19th 2022

TESTA launch flowmeter calibration services

TESTA launch flowmeter calibration services

Having proof of the precision and accuracy of any measurement device is essential to being able to demonstrate the reliability and repeatability of the data it produces. In applications including liquid chromatography and flow chemistry where stable and precise flow are directly related to the reliability of results or quality of product – having a certified, calibrated flow measurement device is required by many users especially those working in regulated industries. In response to this need, we have introduced a calibration and validation service for all users who might need or wish to have their TESTA flowmeter checked or calibrated with a specific solvent. This annual service is available across Europe and is performed at the manufacturer facility, with fast response time and competitive service fees.

Learn more.


October 12th 2022

How to improve your polymer branching determination

How to improve your polymer branching determination

Determination of polymer branching with GPC/SEC is often a challenging task. The requirements regarding accuracy and precision of measured data are more demanding than those for simple molecular weight determination. This challenge places specific requirements on your choice of the required GPC/SEC detectors - DRI, MALS, and viscometer. The typical connection of these three detectors in series leads to an improvement in branching determination results. However, as the delay volume between detectors cannot be optimized, this limits the quality of achievable results. Through development of a combined DRI Viscometer, the HK Combo in which the DRI cell is integral component of the viscometer bridge, TESTA has overcome most of the described problems through its unique “Zero-Delay” design. Used in combination with a MALS, this elegant solution leads to enhanced sensitivity in the lower molecular weight range and to much higher #reliabilityofresults.

Learn more about the HK Combo


October 5th 2022

Reliable, Quantitative LC/MS

Reliable, Quantitative LC/MS

Our new AB-40004 microflowmeter (µFlowmeter) is an affordable non invasive device optimised to provide continuous high precision measurement of low volume liquid flows that may be split off for analysis from chromatography systems. Fully compatible with all organic and aqueous chromatography solvents, the AB-40004 µFlowmeter is the perfect tool for precise measurement of liquid flow to ensure reliable, quantitative HPLC / mass spectrometry (LC/MS) measurements.

Learn more


September 28th 2022

Coreolis versus real time flow monitoring

Coreolis versus real time flow monitoring

We are sometimes asked about the benefits of TESTA’s liquid chromatography flowmeter compared to Coreolis flow devices? Critically our unit offers immediate reading while Coreolis devices typically need 30 seconds or more to stabilise before readings can be considered 'ok'. This long- and variable-time lag with Coreolis devices introduces uncertainty into trusting your flow measurements. Additionally, the time resolution of the TESTA flowmeter is forty-five milliseconds compared to several seconds with a Coreolis device. The low resolution of Coreolis devices means they not suitable for troubleshooting flow problems with your chromatography system which are typically fast processes.

Download ‘real time monitoring’ tech note.


September 21st 2022

TESTA doubles production capacity

Key tools for the Semiconductor industry …. Part 2

Detection of air bubbles in semiconductor manufacturing processes can negatively affect your product quality and production efficiency. For example, the presence of air bubbles in the photoresist used in photo lithography can result in defective wafers. In addition, the presence of air bubbles in semiconductor wafer manufacturing process coolant may lead to an interruption of the process and lower production efficiency. Designed to help solve such problems, the Solvent Line Monitor (SLM) is a programmable, high sensitivity device for automated detection of gas bubbles in liquids.

Learn more.


September14th 2022

Automated detection of empty HPLC system solvent reservoirs.

Automated detection of empty HPLC system solvent reservoirs

While many modern HPLC and uHPLC instruments offer facility to detect empty solvent reservoirs, they also require human intervention to inform the system about the status of solvent feed bottles. Dedicating a technician to such a mundane task is poor use of resources and limits HPLC system running time to standard lab hours.

Learn how to resolve this problem


September 7th 2022

Key tools for the Semiconductor industry …. Part 1

Key tools for the Semiconductor industry... Part 1

Cleaning liquids play a key role in the production of #semiconductor wafers. #Preciseflowmeasurement is critical to ensure that exactly the right amount of #cleaningsolution is used. Too little and the cleaning process must be repeated or worse you risk valuable wafers having to be discarded. Likewise, using too much cleaning solution increases your costs. Built from inert materials, our #LiquidFlowmeter is the perfect real-time non-invasive measurement for this critical application.

Learn more


August 31st 2022

No1 in Precision Liquid Flow Measurement

No1 in Precision Liquid Flow Measurement

Are you looking to #measureliquidflow in #realtime from an analytical or preparative chromatography system, #massspectrometer or #peristalticpump? Then look no further.

Click here to learn more.


August 24th 2022

TESTA doubles production capacity

TESTA doubles production capacity

To ensure that everyone can continue to enjoy quick delivery of all our most popular GPC/SEC, HPLC products – TESTA has doubled its production capacity and significantly invested in key component #stock. This investment follows a significant increase in sales received for our liquid chromatography flowmeter and differential refractive index detectors in particular during 2022.

Learn more.


August 17th 2022

Software assists precise flow monitoring

Software assists precise flow monitoring

Version 1.4 of our flowmeter software enables data to be acquired and visualized in real-time. Operating in conjunction with our Liquid Chromatography flowmeter the easy-to-use PC software app enables fast, simple experimental set-up and provides full control of device settings including integration time and calibration factor. The app will also report average and min/max values of the measured flow. All flow data is automatically stored in files that can be processed later using almost any commercial data analysis package.

Learn more


August 10th 2022

TESTA Co-author Conference Paper

TESTA Co-author Conference Paper

In July 2022, the 3rd International Conference on Ionizing Processes (ICIP) focused on the fundamental chemical, physical and biological science of #ionizingradiation and groundbreaking applications in areas such as nuclear energy, materials synthesis and medicine. At this international meeting, Professor Slawomir Kadlubowski from the renowned #LodzUniversity of Technology (Poland), in conjunction with our own Carlo Dessy, gave a popular presentation – ‘Radiation-induced #synthesisofnanogels’ where the synthesized product property data shown was from a TESTA Analytical triple detection Gel Permeation Chromatography system.

Read presentation (in full)
Learn more about TESTA GPC/SEC systems


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