Simultaneous speciation of arsenic, selenium, antimony and tellurium species in FT waters and soil extracts by capillary electrophoresis and UV detection
Simultaneous speciation of arsenic, selenium, antimony and tellurium species in FT waters and soil extracts by capillary electrophoresis and UV detection
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DOI：
10.1039/a805954c
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发表时间：
1998-12-01
期刊：
影响因子：
4.2
通讯作者：
Potin-Gautier, M
中科院分区：
文献类型：
--
作者：
Casiot, C;Alonso, MCB;Potin-Gautier, M
采用毛细管电泳间接紫外检测法同时测定砷、硒、锑和碲化合物。分离是在填充有电解质溶液的熔融石英毛细管中实现的，该电解质溶液含有铬酸钠和电渗流调节剂氢氧化三甲基十四烷基铵（TTAOH）。研究了TTAOH浓度和电解质溶液pH值对物质电泳迁移率的影响。使用 0.5 mM TTAOH 和电解质 pH 值 11.2 在 5 分钟内实现了这些物质的最佳同步分离。电迁移注射的检测限范围从 Se-VI 的 13 mu g l(-1) 到 Te-IV 的 509 mu g l(-1)。所有物种的重现性低于 10%，并且在 0-100 mg l(-1) 范围内验证了线性。研究了其他无机离子的干扰。该方法适用于加标饮用水中类金属的测定。对工业土壤的水提取物进行了分析，并将结果与 ICP-MS 测量结果进行了比较。
Capillary electrophoresis with indirect UV detection was used to determine simultaneously arsenic, selenium, antimony and tellurium compounds. The separation was achieved in a fused silica capillary filled with an electrolyte solution containing sodium chromate and an electroosmotic flow modifier, trimethyltetradecylammonium hydroxide (TTAOH). The effect of the TTAOH concentration and electrolyte solution pH on the electrophoretic mobility of the species was studied. The best simultaneous separation of these species was achieved with 0.5 mM TTAOH and an electrolyte pH of 11.2 within 5 min. Detection limits range from 13 mu g l(-1) for Se-VI to 509 mu g l(-1) for Te-IV with electromigrative injection. The reproducibility was below 10% and linearity was verified in the 0-100 mg l(-1) range for all species. Interferences by other inorganic ions were studied. This method was applied to the determination of metalloids in a spiked drinking water. Water extracts of industrial soils were analysed and results were compared with those of ICP-MS measurements.