Chromatography 7 Differential refractometer enhances light scattering molecular weight determination
Testa Analytical has introduced a new Differential Refractometer that signifi cantly improves the accuracy of dn/dc determination for light scattering molecular weight analysis. A precise dn/dc value is crucial for accurate molecular weight measurements of biopolymers and polymers using light scattering techniques.
Utilising decades of expertise in Gel Permeation Chromatography (GPC) and Light Scattering, Testa Analytical has developed a highly effective and user-friendly differential refractometer accessory. This device delivers outstanding performance, ensuring reliable results with minimal effort.
The Differential Refractometer provides rapid and precise determination of the specifi c refractive index increment (dn/dc) for dissolved samples, offering high accuracy in just minutes. It is versatile, with no solvent restrictions and an extensive range of measurement temperatures, making it an indispensable tool for any light scattering laboratory. Additionally, the system offers multiple wavelength options, allowing seamless integration with the laser wavelength of light scattering instruments for consistent and reproducible results.
Operated via intuitive Windows™-based software, the device also facilitates the accurate determination of sample concentration for those with known dn/dc values.
Designed for effi ciency, the instrument ensures complete sample recovery without dilution or contamination. Samples measured for dn/dc can be directly used in Light Scattering analysis, streamlining the process and minimising preparation time and potential errors.
More information online:
ilmt.co/PL/x51A 64198pr@reply-direct.com
Reliable fl ow validation for HPLC pumps
Biotech Fluidics introduces a new fl owmeter kit designed for fast, accurate, and reliable validation of HPLC pump performance.
Consistent solvent fl ow is critical for reliable HPLC separations, making pump performance monitoring essential. Traditional validation methods rely on volumetric or Coriolis fl owmeters, both of which have limitations. Volumetric fl owmeters provide integrated readings over long timeframes, lacking real-time variability and pulsation data. Coriolis fl owmeters, while effective, have limited time resolution and are costly.
The Biotech Fluidics Liquid Flowmeter offers a real-time, non-invasive solution based on a thermal sensor, enabling precise HPLC pump validation. The accompanying HPLC Pump Validation Kit processes data via the Biotech Fluidics Liquid Flowmeter PC-App, automatically performing all necessary fl ow calculations. The system validates data for compliance, generates summary reports for documentation, and includes a Standard Operating Procedure (SOP) for streamlined validation.
Beyond performance validation, the kit also detects transient fl ow changes in real-time, including pump pulsation, ensuring optimal HPLC operation.
More information online:
ilmt.co/PL/mnjl 64156pr@reply-direct.com
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