Simultaneous detection of five kinds of olefine chlorides in workplace air by solvent desorption-gas chromatography / 中国职业医学

ABSTRACT

OBJECTIVE: To establish a method for simultaneous detection of five kinds of olefine chlorides in workplace air by solvent desorption-gas chromatography. METHODS: The olefine chlorides in workplace air were collected using activated charcoal tubes,desorbed by carbon disulfide,separated on a HP-INNOWAX capillary column and detected with flame ionization detector. RESULTS: The linear range of the five kinds of chlorinated olefins( vinyl chloride,allyl chloride,chloroprene,trans-1, 2-dichloroethylene, cis-1, 2-dichloroethene) was wide and the linear correlation coefficient was greater than 0. 999 8. The detection limit and the minimum detectable concentrations were 0. 30-0. 80 mg/L and 0. 05-0. 13 mg/m~3,respectively( air sample volume 6. 0 L). The recovery rate was 95. 90%-102. 67%. The within-run and betweenrun relative standard deviations were 0. 00%-3. 74% and 0. 21%-6. 12%,respectively. The samples could be preserved at room temperature for at least 14 days. CONCLUSION: This method has simple operation,good linear range,high sensitivity and good reproducibility,which is suitable for detecting 5 kinds of olefine chlorides in workplace air.