<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">size exclusion chromatography</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31317389</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:25:28</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">GPC</dcterms:alternative> <dcterms:alternative xml:lang="en">SEC</dcterms:alternative> <dcterms:alternative xml:lang="en">chromatography, size exclusion</dcterms:alternative> <dcterms:alternative xml:lang="en">gel permeation chromatography</dcterms:alternative> <dcterms:alternative xml:lang="en">size-exclusion chromatography</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ Size exclusion chromatography (SEC) is a type of chromatography that separates compounds based on differences in molecular size in solution. It uses a separation column containing a porous, semisolid medium which retards transport of larger particle while allowing small molecules to pass quickly through. SEC (also known as gel permeation chromatography) is primarily used for characterizing molecular weight distribution of synthetic polymers. ]]></dc:description></metadata>