GC/MS를 이용한 알칼리 폐수 중 ethylene glycol 정량

Abstract

Treatment with aqueous sodium hydroxide solution plays an important role to impart certain desirable properties - feel and luster on the surface of polyester fiber. In this process alkali wastewater contains disodium terephthalate, ethylene glycol (EG) and residual sodium hydroxide. In this paper we report a new method containing the pretreatments of derivatization with benzoyl chloride and solvent extraction using pentane. The calibration curve of EG determined by GC/MS-SIM shows a good linearity in the range of 0.1 to 25 ㎍/mL having the standard deviation of 8.7 %. The recovery and the detection limit of this method are 91.9-93.7% and 0.05 ㎍/mL respectively.