The Analysis of Volatile Organic Compounds in Water by Using the Purge-and-Trap and the Gas Chromatography/Mass Selective Detector with Modified Indirect Coupling

퍼지-트랩장치와 변형된 간접 결합기를 부착한 기체크로마토그래피/질량 선택성 검출기를 이용한 물중의 휘발성 유기화합물의 분석

A Purge & Trap Concentrator was used to analyze various volatile organic compounds(VOCs) in wat-er. The object of this study was to observe the purge efficiency of 40 VOCs in water according to the change of parameters (purge time drypurge time sample temperature) and to determine the optimum condition for VOCs using the purge & Trap concentrator interfaced with a narrow capillary connected to a gas chromatography/mass spectrometry. The optimum condition of purge and trap is as follows: purge time at 11min drypurge time at 5min sample temperature at 6$0^{\circ}C$ at constant purge flow (40mol/min) constant desorption flow(20ml/min) desorption temperature(2$25^{\circ}C$) and desorption time (1min) At this analytical condition the detection limits of VOCs was in the range of 0.1~0.5$\mu$g/ml and the purge efficiency of each compound was over 70%.