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The new HK Series Differential Refractometer from Testa Analytical Solutions e.K sets a benchmark for precise determination of specific refractive index increment (dn/dc) - an important parameter for polymer and protein molecular weight determination using light scattering techniques.
Dual Detector Enables Sensitive Determination of Molecular Weight Distribution Testa Analytical Solutions e.K reports on the development and OEM supply of a novel combination refractive index/viscometry detector for Brookhaven Instruments Corporation (Holtsville, NY, USA). Polymer and plastics manufacturers offer very many different grades of commodity polymers such as poly(vinyl chloride), polyethylenes, and polystyrenes. The Molecular Weight Distribution (MWD) of such polymers is a key item of information in tailoring their implementation for different end uses. The Brookhaven Instruments B...
Jan 06 2021 Read 1616 Times The Differential Refractive Index (DRI) detector from Testa Analytical Solution eK offers unmatched accuracy and reliability for determination of absolute concentration and total mass balance in Gel Permeation Chromatography/Size Exclusion Chromatography (GPC/SEC) applications. The baseline signal stability of any liquid chromatography detector is very important, as it is a limiting factor in peak determination. Detector stability gains even more importance where analysis time is long, such as is commonly encountered in high resolution GPC/SEC applicati...