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: https://www.testa-analytical.com/hplc-chromatography.html

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.

October 12th 2022

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

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.