[Determination of dichlorobromomethane in water by headspace-trap gas chromatography/mass spectrometry].
A novel method was developed for the determination of dichlorobromomethane in water using headspace-trap gas chromatography/mass spectrometry (GC/MS). Three parameters of headspace-trap including thermostatic temperature, time and cycle number were optimized by orthogonal experiment analysis. Dichlorobromomethane in water samples was analyzed under the optimized conditions of 70 degrees C and 20 minutes with the cycle number of two. The results showed that the calibration curve was linear in the range of 0.1 - 10.0 microg/L, and the correlation coefficient was 0.999 1. The detection limit was 0.03 microg/L. The average recovery was 83.1% - 111.3% with the relative standard deviation (RSD) not more than 5.2% (n = 6). This method is rapid, sensitive and reproducible for the routine detection of the low concentration of dichlorobromomethane in water.
National Marine Food Quality Supervision and Testing Center, Zhoushan 316021, China. zxhuaxueshi@163.com
Pingya
P
Wang
Hua
H
Zhao
Yong
Y
Zhou
Zhenjian
Z
Xu
Yifei
Y
Dai
Weiying
W
Zhang