this method for assay of polyamines ( putrescine , spermidine , and spermine ) in large numbers of urine samples is based on preliminary analyte isolation by use of a dowex 50w column , separation by high-voltage paper electrophoresis , reaction with ninhydrin to detect the separated amines , and subsequent direct assay with a dual-wave-length thin-layer chromatography scanner by the zigzag scanning method .
C0032433
polyamines
C0002508
amines