Authors: X. Michael Liu
Size Exclusion Chromatography (SEC) or High Performance Size Exclusion Chromatography (HPSEC) is the most broadly accepted method for the determination of molecular weights and molecular weight distributions of macromolecules. It is a special type of liquid chromatography that separates molecules based on molecular sizes or hydrodynamic volumes and not according to partition or affinities toward the stationary phases. HPSEC is also called Gel Permeation Chromatography (GPC) in polymer science and gel filtration chromatography (GFC) in the biological sciences. Conventional HPSEC equipped with a concentration detector (i.e. refractive index, UV-vis, or photodiode array) acquires molecular weights and molecular weight distributions of analytes according to the elution volumes or a peak position calibration using a series of standards of known molecular weights and chemistry. Therefore, the obtained molecular weights and molecular weight distributions by conventional HPSEC are the relative ones. The advantages of conventional SEC are high robustness, excellent reproducibility, and ease of transfer between laboratories. You can submit your Manuscripts at: https://symbiosisonlinepublishing.com/submitManuscript.php
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