摘要
目的：建立一种准确、方便、易操作的水碘测定方法,方法：利用碘化物对砷-铈氧化还原反应的催化作用进行分光光度法测定,结果：取水样0．25mL，最低检测浓度31．μg／L，碘浓度在0—600μg／L的范围内呈良好的线性关系，相关系数r=-0．9998，回收率范围98．71％～101．44％，精密度与准确度均符合要求,多种离子均不干扰测定结果，结论：操作及计算简单快速，结果准确可靠。
Objective： To establish a accurate and simple method to determine the microiodine in water. Methods： The contents of iodine in water were determination by spectrophotometry based on the catalysis of iodine on oxidation-reduction reaction between arsenic and cerium. Results ：The improved method revealed better linear relation-ship in the range of 0 - 600μg/L iodine. The detection limit of 0.25 mL water sample, correlation coefficient, recovery rate were 3μg/L, -0. 9998,98.71%～101.44%. The precision and accuracy of the improved method were qualified. The existence of a complicated reaction solution system with multiple ions at a certain concentration did not interfere with the data obtained by the improved method. Conclusions： The improved method revealed easy, rapid opetation and calculation. The results were precise and reliable.
出处
《商丘师范学院学报》
CAS
2008年第3期83-84,共2页
Journal of Shangqiu Normal University
关键词
水碘
氧化还原反应
分光光度法
water iodine
oxidation - reduction reaction
spectrophotometry
