Polystyrene standard is widely used in the field of analytical chemistry as a calibration material for size exclusion chromatography (SEC) and gel permeation chromatography (GPC). It helps in determining the molecular weight distribution of polymers by providing a reference with known molecular weights. This is crucial for quality control in polymer production and research, ensuring consistency and performance of materials. Additionally, it is employed in the development and validation of analytical methods, aiding in the accurate characterization of synthetic and natural polymers. Its uniform properties make it a reliable tool for instrument calibration and standardization across laboratories.