离子色谱法快速测定饮用水中3种卤乙酸含量研究

Ion chromatography determination of haloacetic acids in drinking water

目的：建立简便快速梯度淋洗离子色谱法测定饮用水中-氯乙酸（MCAA）、二氯乙酸（DCAA）、三氯乙酸（TCAA）3种卤乙酸含量。方法：选用lonpacASll阴离子分析柱，0～15mmol／LKOH淋洗液，流速为1．0ml／min，电导检测器。样品经0．45μm滤膜过滤后直接进样。结果：本法相关性好（r=〉0．9991以上），精密度高（RSD％〈5．0），样品加标平均回收率为88．9％～103％，最低检出量0．020～0．025μg/ml。结论：该法操作简单、快速、准确、灵敏，适用于大批水样分析。

Objective：An ICS method was applied to simultaneously determine haloacetic acids in drinking water. Methods： The method was based on ICS separation under the condition of isocratic eluent with 0 ～15 mmol/L KOH and flow rate of 1.0 ml/ min by using of the IonPAC AS11 analytical column and suppressed conductivity detector. Results：This method had good relativity （r = 〉0. 9991 ） and good analytic precision （RSD% 〈5.0）. The samples＇average recoveries were 88.9% - 103% and the detection limit 〈 0. 020 -0. 025μg/ml. Conclusion：Its advantages are simple operation, quickness, high sensitivity and precise results. This method can be applied widely and suitable for trace analysis of water samples.