When was your Brookhaven DLS or Gonio system last validated?

Annual validation and qualification of DLS Particle Sizer / Zeta Potential instruments and goniometer systems, is a frequently overlooked necessity to ensure the consistency and reliability of your results. By experience, we know that this important task to assure quality of results is often forgotten, delayed, or sometimes even not considered at all. TESTA Analytical is the European organization designated by Brookhaven Instruments as experienced and capable of performing the necessary tasks and full instrument checks in accordance with manufacturer specifications and, if required, with 21CFR11, GMP and other regulations concerning trustworthiness of results obtained with such top-notch equipment.

September 18th 2025

Method of validating the operating performance of my HPLC systems – TESTA Analytical Solutions

FAQ: I work in a pharma lab and need a better method of validating the operating performance of my HPLC systems from different suppliers.

A: FlowChrom is an automated non-invasive, real-time monitoring system providing a continuous digital record of your HPLC system performance. While most HPLC and UHPLC are designed to operate 24/7, unfortunately it is not uncommon for issues to arise when these systems are left unattended. In many instances, it is difficult to understand what the source of the operating problem was, to determine when it occurred and how many HPLC separations were affected and must therefore be repeated. One of the most common problems with liquid chromatography systems is malfunction of the solvent delivery system indicating the importance of constant surveillance and tracking of your HPLC pump performance. Read how a leading European pharmaceutical lab was delighted how FlowChrom 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.

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Expanding support in French speaking markets.

We are delighted to announce a new partnership with MAZET & Co, (Strasbourg, France) who have an outstanding record of supporting laboratories with advanced chromatography and analytical technologies. In addition to expanding and better supporting TESTA flowmeter customers in French speaking markets across Europe and North Africa, this agreement reflects the two organizations’ shared commitment to offering advanced chromatography products to help separation scientists and process engineers achieve precise, qualified results.

Spare parts and servicing of GPC/SEC viscometers.

For polymers where no appropriate standards are available, using GPC/SEC with viscosity detection is a trusted technique to derive details of polymer structure and the molar masses. Drawing upon decades of experience in developing viscometry detectors - TESTA Analytical has introduced a new cost competitive service to repair and provide spare parts for GPC/SEC viscometers from Polymer Standard Service (PSS), now part of Agilent.