碘离子和硫氰根离子的离子交换色谱测定法  

Determination of Iodide and Thiocyanate by Anion-exchange Chromatography

作　　者：张小乐[1] 闫金萍[1] 张一江[1] 贾长虹[2] 

机构地区：[1]河北理工大学轻工学院,河北唐山063020 [2]河北理工大学化工与生物技术学院,河北唐山063020

出　　处：《环境与健康杂志》2007年第11期910-912,共3页Journal of Environment and Health

基　　金：河北理工大学科学研究基金资助项目(z200721)

摘　　要：目的研究一种适用于痕量碘离子和硫氰根离子测定的离子交换色谱法。方法将含有碘离子和硫氰根离子的待测液以1.0ml/min的流量通过自制的离子交换整体柱,然后以溴化钾溶液洗脱、分离,并用紫外检测器于236nm处测定了两种阴离子的含量。结果在上述条件下,碘离子和硫氰根离子在色谱柱上分离效果很好。该方法所得碘离子的线性方程为:y=3272860x+51929.53757,r=0.99903,线性范围为0.30～3.0mmol/L,检测限为1.27μg/L,回收率为87%,RSD为2.75%;所得硫氰根离子的线性方程为:y=3163690x+1057080,r=0.99949,线性范围为5.0～80mmol/L,检测限为30μg/L,回收率为85%,RSD为3.22%。结论该方法简单、可靠,抗干扰强,在碘离子和硫氰根离子的痕量分析方面有一定的实用价值。Objective To develop an anion-exchange chromatographic method for the determination of trace thiocyanate and iodide. Methods A sample containing thiocyanate and iodide was pumped through a continuous rod anion-exchange column and the two anions were eluted subsequently with potassium bromide and were determined by a UV detector simultaneously. Results It was proved that the chromatographic column could separate thiocyanate and iodide effectively in the optimum conditions. The linear equation of iodide was y=3 272 860x+51 929.537 57, r=0.999 03, the final detection range was 0.30-3.0 mmol/L, the detection limit was 1.27 μg/L, the recovery rate was 87% and RSD was 2.75%, the linear equation of thiocyanate was y=3 163 690 x+1 057 080, r=0.999 49, the final detection range was 5.0-80 mmol/L, the detection limit was 30 μg/L, the recovery rate was 85% and RSD was 3.22%. Conclusion This method is simple, reliable, better anti-interference and is applicable to the determination of trace thiocyanate and iodide.

关 键 词：碘离子 硫氰根离子 色谱法 离子交换 

分 类 号：O657.7[理学—分析化学]