. "A trap column is a chromatography column which is used prior to a, e.g. mass spectrometry, separation to clean up or concentrate controlled amounts of samples prior to elution to a detector." . "GROUP:" . . "trap column" . "PERSON:Daniel Schober" . "http://msi-ontology.sourceforge.net/ontology/CHROM.owl#msi_01261" . . "trap column" . .