ANALYSIS OF TOXIC ORGANIC CHLORIDES IN COMMERICAL PAE BY HEADSPCE GAS CHROMATOGRAPHY

摘要

This study demonstrated a headspace gas chromatographic(HS-GC)method for determining the toxic species of commercial polyamide polyamine epichlorohydrin(PAE)which was an important wet strength resin in paper industry.These harmful species were organic chlorides,including 1,3-dichloro-2-propanol(DCP),3-chloro-1,2-propanediol(CPD)hydrolyzed by epichlorohydrin(ECH)that was not completely reacted during synthesis process of PAE,and a small amount of the residual epichlorohydrin.The vapor-liquid equibilibrium of samples could be achieved at 90℃ for 20 min in a closed headspace sample vial,then the volatile compounds in the vial was determined by HS-GC using a flame ionization detector.This method required no pretreatment.The results showed that the method has a good measurement precision(RSD ＜ 0.6513％),the LOQ of the analysis was 0.67％、0.00197％,and 0.264％(in mass fraction)for CPD,ECH and DCP,respectively.)The present method was very simple,accurate,and fully automated.Thus it could be easily applied to analyze the toxic organic chlorides in commercial PAE.