摘要
目的 研究准确、灵敏、简便、快速测定海水中含碘量的方法。 方法 采用 F- 78型脉冲极谱仪于底液 KCl浓度为 0 .5 m ol/ L ,EDTA为 2 .4× 10 - 4 mol/ L ,p H为 9.5 ,通纯氮气除氧 2 0 min条件下测定海水的含碘量。 结果 样品的回收率 97.7%～ 10 5 % ,测定海水中 IO3- 离子和 I- 离子含量的标准偏差分别为 1.87和 1.16 ,最低检测量为 1.8μg/ L ,该法测定结果与分光光度法对比基本一致。 结论 微分脉冲极谱法可以准确测定海水中的碘。
Objective\ To investigated a kind of accurate, sensitive, simple and rapid method for determining iodine in sea water.\ Methods\ Iodine in sea water was determined by F\|78 pulse polarograph under conditions of 0 5 mol/L KCl, 2 4×10\+\{-4\} mol/L EDTA, pH=9 5 and removing O\-2 by inflation of pure N\-2 for 20 minutes.\ Results\ Recovery rate of sample was 97 7%~105%.\ Standard deviations of determining IO\-3\+- and I\+- in sea water were 1 87 μg/L and 1 16 μg/L, respectively.\ The detection limit was 1 8 μg/L.\ The determining results between pulse polarography and spectrophotometry mathod were no difference.\ Conclusion\ Differential pulse polarography may determine iodine in sea water accurately.\;
出处
《福建医科大学学报》
2001年第2期180-183,共4页
Journal of Fujian Medical University
关键词
微分脉冲极谱法
海水
碘
测定
differential pulse polarography
sea water
iodine
