气相色谱法测定饮用水中碘代消毒副产物碘代三卤甲烷的研究

发布时间：2018-05-30 01:32

本文选题：液液萃取 + 气相色谱-电子捕获检测器　；参考：《分析测试学报》2015年11期

【摘要】：对比研究了吹扫捕集/气相色谱-质谱法(PT/GC-MS)和液液萃取-气相色谱/电子捕获检测器(LLE-GC/ECD)检测饮用水中碘代三卤甲烷(I-THMs)的分析方法。结果表明,采用甲基叔丁基醚(MTBE)作为萃取剂直接液液萃取,LLE-GC/ECD检测更适于I-THMs的分析。在选定条件下,内标法定量,6种ITHMs在0.5~1 000μg/L范围内线性关系良好,相关系数均大于0.99,相对标准偏差(RSD,n=7)为3.9%~6.4%,方法检出限为0.05~0.11μg/L。0.5,2.0,10.0μg/L加标水平下,分别对某地表水、水厂滤后水和自来水进行I-THMs的加标回收实验,平均回收率为81.2%~108.6%,RSD为2.6%~7.7%。结果表明,该方法简便、快速、灵敏,适用于饮用水中新兴消毒副产物I-THMs的检测。
[Abstract]:A comparative study was carried out on the determination of I-THMsin drinking water by purging / gas chromatography-mass spectrometry (PTP-GC-MS) and liquid-liquid extraction gas chromatography / electron capture detector (ECD-LLE-GC / ECD). The results showed that the detection of LLE-GC / ECD was more suitable for the analysis of I-THMs using methyl tert-Ding Ji ether as the extractant for direct liquid-liquid extraction (LLE-GC / ECD). Under the selected conditions, the linear relationship of six kinds of ITHMs was good in the range of 0.5 ~ 1 000 渭 g / L, the correlation coefficient was greater than 0.99, and the relative standard deviation (RSD) was 3.9 ~ 6.4.The detection limit of the method was 0.05 ~ 0.11 渭 g 路L ~ (-1) 渭 g 路L ~ (-1), and the detection limit was 0.05 ~ 0.11 渭 g 路L ~ (-1) 0.52.010.0 渭 g / L, respectively. The average recovery rate of I-THMs in filtered water and tap water was 81.2% and 108.6% respectively. The results showed that the method was simple, rapid, sensitive and suitable for the detection of I-THMs, a new disinfection by-product in drinking water.
【作者单位】：广西民族大学化学化工学院广西高校食品安全与药物分析化学重点实验室;中国科学院生态环境研究中心中国科学院饮用水科学与技术重点实验室;
【基金】：国家自然科学基金(21367004) 中国博士后基金(2014M550096) 广西自然科学基金(2014GXNSFAA118284) 广西科技开发计划项目(桂科能14123006-24) 广西民族大学相思湖青年学者创新团队资助
【分类号】：O657.71;R123.1

【参考文献】