GB/T 47142-2026

This standard specifies the use of size exclusion chromatography combined with multi-angle laser light scattering (SEC-MALLS) for determining the absolute molecular weight and molecular weight distribution of polysaccharides. It is applied in the food, pharmaceutical, and biochemical industries for quality control and characterization of natural or modified polysaccharides, such as those used in thickeners, drug delivery systems, or dietary supplements. The method is particularly relevant for research and testing laboratories requiring accurate, calibration-free molecular weight analysis without reference standards.