衍生化吹扫捕集-气相色谱-质谱法测定饮用水中的6种氯酚

建立了饮用水中6种氯酚的检测方法。调节水样pH后,经乙酸酐衍生化、吹扫捕集后经气相色谱-质谱测定,外标法定量。在0.004～0.120mg/L范围内,方法的线性关系良好,相关系数为0.9972～0.9999,加标回收率为94.2%～112%,相对标准偏差为1.88%～5.27%。该方法简便、灵敏度高,完全可以满足饮用水中6种氯酚的痕量检测要求。

Determination of Six Chlorophenols in Drinking Water by Derevitazation Purge-and-Trap GC-MS

A method was developed for the determination of 6 chlorophenols.The sample pH was adjusted by adding potassium carbon. Then, acetic anhydride was added.Chlorophenols were derivatized and submitted to the purge-and-trap precocentration system coupled to GC-MS with external standard method. The result indicated that the calibration curves showed good linear relationship and concentration in the range of 0.004~0.120mg/L.The correlation coefficients were in the range of 0.9972~0.9999.The recoveries of 6 chlorophenols were in range of 94.2%~112% and the relative standard deviations of 1.88%~5.27%.The method was simple and sensitive and was suitable for the determination of 6 chlorophenols in drinking water.