二维离子色谱法测定环境水中的碘离子、硫氰酸根离子和高氯酸根离子

[Determination of iodide, thiocyanate and perchlorate ions in environmental water by two-dimensional ion chromatography].

作者信息

Lin Li, Wang Haibo, Shi Yali

机构信息

China National Food and Safety Supervision and Inspection Center, Beijing 100094, China.

出版信息

Se Pu. 2013 Mar;31(3):281-5. doi: 10.3724/sp.j.1123.2012.10034.

DOI:10.3724/sp.j.1123.2012.10034

PMID:23786003

Abstract

A procedure for the determination of iodide, thiocyanate and perchlorate ions in environmental water by two-dimensional ion chromatography has been developed. At first the iodide, thiocyanate and perchlorate ions were separated from interfering ions by a column (IonPac AS16, 250 mm x 4 mm). The iodide ion, thiocyanate and perchlorate ions were then enriched with an enrichment column (MAC-200, 80 mm x 0.75 mm). In the 2nd-dimensional chromatography, iodide thiocyanate and perchlorate ions were separated and quantified by a capillary column (IonPac AS20 Capillary, 250 mm x 0.4 mm). The linear ranges were 0.05 -100 pg/L with correlation coefficients of 0. 999 9, and the detection limits were 0. 02 - 0.05 micro gg/L. The spiked recoveries of iodide, thiocyanate and perchlorate ions were in the range of 85.1% to 100.1%. The relative standard deviations of the recoveries were 1.7% to 4.9%.

摘要

已开发出一种通过二维离子色谱法测定环境水中碘离子、硫氰酸根离子和高氯酸根离子的方法。首先，碘离子、硫氰酸根离子和高氯酸根离子通过一根色谱柱（IonPac AS16，250 mm×4 mm）与干扰离子分离。然后，碘离子、硫氰酸根离子和高氯酸根离子用一根富集柱（MAC - 200，80 mm×0.75 mm）进行富集。在二维色谱中，碘离子、硫氰酸根离子和高氯酸根离子通过一根毛细管柱（IonPac AS20 Capillary，250 mm×0.4 mm）进行分离和定量。线性范围为0.05 - 100 μg/L，相关系数为0.9999，检测限为0.02 - 0.05 μg/L。碘离子、硫氰酸根离子和高氯酸根离子的加标回收率在85.1%至100.1%范围内。回收率的相对标准偏差为1.7%至4.9%。