摘要
采用衍生顶空气相色谱法测定饮用水源水中的三氯乙醛。通过加碱将三氯乙醛转化成氯仿,采用微电子捕获检测器(μECD)进行检测,优化了顶空色谱条件。三氯甲醛的浓度在1.0～20.0μg/L范围内与色谱峰面积呈良好的线性关系,相关系数r=0.9994。对2.0μg/L标准溶液重复测定6次,测定结果的相对标准偏差为4.1%,方法的检出限为0.10μg/L。实际水样平均加标回收率为97%。该方法满足GB3838-2002的要求。
The method for determining chloral in drinking source water by using derivation-headspace gas chromatography method was developed.Chloral was converted into chloroform by adding alkaline,and then detected by μECD.The Headspace parameters were optimized.The concentration of chloral was linear with chromatography peak area in the range of 1.0-20.0 μg/L.The correlation coefficient was 0.999 4.The RSD of determined results for 2.0 μg/L chloral was 4.1%(n =6).The method detection limit was 0.10 g/L,and the avera...
出处
《化学分析计量》
CAS
2009年第5期62-63,共2页
Chemical Analysis And Meterage
关键词
饮用水
三氯乙醛
衍生顶空气相色谱法
drinking water
chloral
derivatization-headspace gas chromatography
