离子色谱法同时测定饮用水中铬(六价)、草甘膦、高氯酸盐及7种阴离子含量  

Simultaneous determination of chromium (hexavalent), glyphosate, perchlorate and7 anions content in drinking water by ion chromatography

作　　者：周亮 吴国权 陈洁 ZHOU Liang;WU Guoquan;CHEN Jie(Chongqing Kaizhou District Center for Disease Prevention and Control,Chongqing 405499,China;Thermo Fisher Technology(China)Co.,Ltd.,Guangzhou 510800,China)

机构地区：[1]重庆市开州区疾病预防控制中心,重庆405499 [2]赛默飞世尔科技(中国)有限公司,广东广州510800

出　　处：《中国酿造》2024年第12期271-275,共5页China Brewing

基　　金：国家社科基金项目(19XMZ077)。

摘　　要：该研究通过优化色谱条件及方法学考察建立了一种离子色谱技术同时测定饮用水中痕量铬(六价)、草甘膦(GLY)、高氯酸盐及7种常规阴离子(F^(-)、Cl^(-)、NO_(2)^(-)、Br^(-)、NO_(3)^(-)、SO_(4)^(2-)、PO_(4)^(3-))含量的方法,并采用该方法对饮用水中的10种目标物进行测定。结果表明,最优色谱条件为:以Dionex^(TM) IonPac^(TM) AS20为分析柱,Dionex^(TM) IonPac^(TM) AG20为保护柱,KOH为淋洗液,梯度洗脱,流速为1.0 mL/min,抑制器为ADRS600(4 mm),抑制电流为138 mA,柱温为30℃,检测器温度为35℃,进样量为500μL。痕量铬(六价)、GLY、高氯酸盐及7种常规阴离子在各自的线性范围内具有良好的线性关系(R^(2)>0.999),检出限(LOD)和定量限(LOQ)均在0.079~1.145μg/L和0.263~3.817μg/L之间;各物质之间的分离度>1.5;重复性、稳定性试验结果的相对标准偏差(RSD)均≤3.38%;以饮用水为本底进行加标回收试验,各物质的平均加标回收率为90.9%~98.1%,加标回收率试验及精密度试验结果的RSD分别为0.67%~4.33%、0.12%~3.33%。综上,该方法适用于饮用水中痕量铬(六价)、GLY、高氯酸盐及7种常规阴离子的同时测定。An ion chromatography method for simultaneous determination of trace chromium(hexavalent),glyphosate(GLY),perchlorate and 7 conventional anions(F^(-),Cl^(-),NO_(2)^(-),Br^(-),NO_(3)^(-),SO_(4)^(2-),PO_(4)^(3-))in drinking water by optimizing chromatographic conditions and methodological investigation was established,and the 10 targets in drinking water was determined.The results showed that the optimized chromatographic conditions were:Dionex IonPac^(TM) AS20 as analytical column,Dionex IonPac^(TM) AG20 as protection column,KOH as eluent,gradient elution,flow rate 1.0 ml/min,suppressor ADRS600(4 mm),suppression current 138 mA,column temperature 30℃,detector temperature 35℃,and sample volume 500μL.Trace chromium(hexavalent),GLY,perchlorate and 7 conventional anions had good linear relationships in their respective linear ranges(R^(2)>0.999).The limits of detection(LOD)and limits of quantification(LOQ)of each substance were 0.079-1.145μg/L and 0.263-3.817μg/L.The resolution between each substance was>1.5.The relative standard deviation(RSD)of the reproducibility and stability test results were both≤3.38%.The spiked recovery rate tests with drinking water as the substrate,the average recovery rates of each substance were 90.0%-99.3%,and the RSD of spiked recovery rate and precision tests were 0.67%-4.33%and 0.12%-3.33%,respectively.In summary,the method was suitable for simultaneous determination of trace chromium(hexavalent),GLY,perchlorate and 7 common anions in drinking water.

关 键 词：饮用水 铬(六价) 草甘膦 阴离子 离子色谱法 抑制电导 

分 类 号：TU991.21[建筑科学—市政工程]