饮用水中5种卤乙酸的检测方法研究

Method of analyzing five haloacetic acids in drinking water

对饮用水中5种卤乙酸的测定方法进行了研究,建立了卤乙酸经酯化/衍生的气相色谱法分析程序。结果表明:除MCAA外,10 μg/L HAAs加标回收率为104.9％-119.9％,方法检测限达到0.4 μg/L,测定相对标准差低于6.2％。对实际水样测定表明:S市饮用水中卤乙酸主要为TCAA、DCAA。试验证明此方法准确度高且再现性好。

The results of analysis of five Haloacetic Acids (HAAs) in drinking water with GC program set up by extraction and derivatization showed that the spiking recovery of 10μg/L HAAs ranged from 104.9% to 119.8% except MCAA. MDL, standard deviation and relative standard deviation were below 0. 4μg/L,0. 118 and 6. 2% respectively. The analysis of field samples showed that HAAs were mainly constituted of DCAA and TCAA of cit-y S in drinking water. The experiment results proved that the recurrence and accuracy were good.