GC-MS Determination of Diisocyanate Esters in Polyurethane Adhesives

GC-MS was applied to the determination of diisocyanate esters in polyurethane adhesives. The sample was extracted ultrasonically with ethyl acetate for 15min.The HP-5 chromatographic column was used for the GC separation and the full-scanning and selected ion monitoring mode were adopted in MS detection. Linear relationships between peak area and mass concentration of the diisocyanate esters were in definite ranges, with lower limits of determination (10S/N) in the range of 5-100 mg·kg-1. On the base of blank sample. Recovery measured using standard addition method were in the range of 60.8%-97.5%, with RSD′s (n=6) in the range of 0.67%-7.1%.