水中硫醇和硫醚类致嗅物的吹扫捕集-气相色谱-质谱联用测定法

Determination of Thioalcohol and Thioether in Water by Purge-and-trap Method Combined with Gas Chromatography-Mass Spectrometry

目的建立水中硫醇、硫醚类致嗅物的气相色谱．质谱测定法。方法采用吹扫．捕集法对水中4种硫醇、硫醚进行富集，热解吸后导入气相色谱．质谱仪中用选择离子检测模式（SIM）同时进行测定。结果4种硫醇和硫醚的线性相关系数为0．9965-0．9994，样品加标回收率为95．2％～98．2％，RSD〈3％，检出限≤3ng／L。结论该方法操作简便、快速，适合于检测水中硫醇、硫醚类致嗅物的含量。

Objective To establish a new method for the rapid determination of thioaleohol and thioether in water. Methods Tbioalcohol and thioether compounds were extracted by purge-and-trap and separated by GC. Results The linear correlation coefficients of thioaleohol and thioether were between 0.996 5 and 0.999 4. The average rates of recovery were between 95.2% and 98.2%. The relative standard deviation was less than 3%（n=6）, with limits of detection （3S/N） less than 3 ng/L. Conclusion The method established in the study is applicable tothe determination of thioaleohol and thioether in water for it＇s precision, accuracy and sensitivity.