巯基葡聚糖分离富集—电感耦合等离子体质谱法测定水中的痕量锡  

The determination of trace tin in water samples by inductively coupled plasma mass spectrometry (ICP-MS) after separation and enrichment using mercapto containing dextran gel

作　　者：徐冰旭 邢夏[1] 徐进力[1] 陈海杰[1] 张勤[1] 刘亚轩[1] XU Bing-Xu;XING Xia;XU Jin-Li;CHEN Hai-Jie;ZHANG Qin;LIU Ya-Xuan(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所

出　　处：《物探与化探》2019年第4期822-827,共6页Geophysical and Geochemical Exploration

基　　金：中国地质科学院物化探研究所基本科研业务费(AS2015J05)

摘　　要：地球化学水样品中锡的含量普遍较低,目前还没有标准检测方法。笔者采用巯基葡聚糖凝胶(SDG)对水样品进行分离富集,利用电感耦合等离子体质谱法(ICP-MS)测定了样品中的痕量锡。通过对SDG柱分离条件优化,得到在过柱溶液酸度为1%(v/v)的盐酸、离子强度(以NaAc浓度计)为0.1mol·L^-1、洗脱液酸度为6mol·L^-1盐酸、洗脱液体积为30mL的条件下,锡的分离效果最佳。将该方法应用于实际水样品分析中,方法检出限为0.37μg·L^-1,方法精密度(RSD%)在10%以内,加标回收率为90%~110%,可以满足地球化学水样品中痕量锡的测定。The content of tin in geochemical water samples is generally low,and there is no standard method which can be used currently.In this investigation,the trace tin in water samples was detected by inductively coupled plasma mass spectrometry(ICP-MS)after separation and enrichment using mercapto containing dextran gel(SDG).The separation conditions of the SDG column were optimized.The separating effect of tin was the best when the acidity of the solution before filtering by the column was 1%(v/v)hydrochloric acid,the ion strength was 0.1mol/L counted by NaAc,the acidity of eluent was 6N hydrochloric acid and the volume of the eluent was 30 mL.When the proposed method was applied to analyzing actual water samples,the detection limit of tin was 0.37μg/L,the precision(RSD%)was less than 10%,and the recovery rate was in the range of 90%~110%,which could satisfy the determination requirement of trace tin in geochemical water samples.

关 键 词：锡 巯基葡聚糖凝胶 电感耦合等离子体质谱法 水样品 

分 类 号：O652[理学—分析化学] P632[理学—化学]