Spectrophotometric Determination of Lodine in Soils by Chloramine T-Tetrabase System  

氯胺T-四碱分光光度法测定土壤中微量碘(英文)

作　　者：胡兰[1] 杨刚[1] 

机构地区：[1]安徽地质实验研究所,安徽合肥230001

出　　处：《Agricultural Science & Technology》2009年第5期13-14,17,共3页农业科学与技术（英文版）

摘　　要：Optimized the experimental conditions of determination of trace iodine in soil in chloramine T-Tetrabase system, and analysis the national standards material, the results showed that the measured values was to be identical with recommended values with a detection limit of 0.16 μg/g, and the relative standard deviation was less than 8%, the whole process was short in time and simple, so it was applicable to the determination of trace iodine in batches.优化了氯胺T-四碱催化分光光度法测定土壤中微量碘的试验条件:比色时间25 s、醋酸加入量4 ml、四碱加入量5 ml、氯胺T加入量2ml(1.2 g/L)。并对国家一级标准物质(GBW07401、GBW07403、GBW07405)进行分析,结果证明其测定值与推荐值吻合,检出限为0.16μg/g,方法相对标准偏差小于8%。且该法较Fe3 +-SCN--NO-体系测定微量碘更为简便快速,更利于微量碘的批量测定。

关 键 词：IODINE Chloramine T-Tetrabase system Catalytic spectrophotometry SOIL 

分 类 号：X833[环境科学与工程—环境工程]