Analysis of Propylene oxide in drinking water using headspace gas chromatogaphy mass spectrometry
- Analysis of Propylene oxide in drinking water using headspace gas chromatogaphy mass spectrometry
- 이수진; 김해동; 박주현; 이정애; 표희수
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- Propylene oxide is reported to be possibly carcinogenic to humans from IARC and IRIS. However, it is useful as initiator or intermediate to make the chemical product such as propylene glycol and polyether for making polyurethane plastics. And it is used as a fumigant and a soil sterilant. Therefore, it is necessary that we have to been monitoring propylene oxide in drinking water. This study was carried out by headspace extraction combined gas chromatography mass spectrometry(HS-GC-MS). We experimentally compared three factor which affect head space extraction for influence of ionic strength, incubation temperature and time. The extract condition was no NaCl, 80 ℃ of incubation temperature and 30 min incubation time. The calibration curves were obtain analysing standard solution and showed good linearity with correlation coefficient over 0.99. The range of concentration studied were 2 - 200 ngmL-1. The limits of detection(LOD) is 2 ngml-1. The precision and accuracy of the method determined as the repeatability(n=7) of two concentration levels within a day and between 5 days. Precision is 6.05 % (20 ngml-1), 0.64 % (200 ngml-1) in intra day and 3.75 % (20 ngml-1), 3.11 % (200 ngml-1) in inter day. Accuracy is 4.58 % (20 ngml-1), 0.46 % (200 ngml-1) in intra day and 2.83 % (20 ngml-1), 2.62 % (200 ngml-1) in inter day. We analyzed 150 disinfectant water and 36 raw water. The samples(n=186) were not detected. This method is simple, rapid and convenient for analysis of propylene oxide in drink water.
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