热释－流动注射分析方法测定化探样品中的碘  

THE DETERMINATION OF IODINE IN GEOCHEMICAL EXPLORATION SAMPLES BY USING HEAT RELEASE WITH FLOW INJECTION ANALYSIS

作　　者：张学洪[1] 

机构地区：[1]桂林冶金地质学院应用化学系

出　　处：《桂林冶金地质学院学报》1994年第1期86-90,共5页

摘　　要：本文设计和组装了一套热释碘装置，研究了热释碘的最佳条件，碘的热释率为９８．８％，热释碘的精密度为５．０％左右，建立了热释碘的流动注射分析方法，并成功的用于热释碘样品的测定，样品溶液不需要经过预处理，便可直接用于测定，进样频率为１２０次／ｈ；精密度（ＲＳＤ％）为０．５７％（对含碘离子为０．０３μｇ／ｍｌ样品溶液而言）；检出限为０．００２μｇ／ｍｌ，；线性范围为０．００２μｇ／ｍｌ－０．０５μｇ／ｍｌＩ－。用本法对３个地球化学标准参考样（Ｇｓｓ－１，３，７）进行分析测定，其结果与这些标准样品的最佳估计值和推荐值非常地一致。A rapid, efficient and interference-free method for determination of iodine in geochemical exploration samples by means of heat release with flow injection analysis is described. A set of iodine heat release devices was designed and assembled in this paper.The recovery ratio of iodine was 98.8%. The percision (RSD,% ) of iodine heat release was about 5.0%. Meanwhile, the method for the determination of I- in iodine heat release sysytem by flow injection analysis has been established in this paper. The sample solution was injected directly into the apparatus without pre-treatment. The proposed method allowed 120 determinations of iodine per hour with good precision. The precision (RSD, % )for samples containing 0.03μg/ ml I- was 0.57 %. The detection limits of I- was 0.002μg / ml. Linear calibration ranges was 0.002-0.05 μg / ml I-. Accuracy of the method wasevaluated through the analysis of 3 geochemical standard reference samples (GSS-1, 3,7)and was found to be in good agreement with the certified or recommended values.

关 键 词：碘 热解 流动注射分析 矿样 

分 类 号：P632[天文地球—地质矿产勘探]