紫外分光光度法测定碘酸钾盐中碘的方法研究.pdf
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《广州食品工业科技》 Guangzhou Food Science and Technology Vol.20 No.3(总 81)
中图分类号：O657.3；文献标识码：A；文章篇号:1007-2764(2004)03-0125-048
紫外分光光度法测定碘酸钾盐中碘的方法研究
黄俊盛 任乃林 张若茹
（韩山师范学院化学系, 潮州 521041）
3
摘 要：利用在酸性条件下，IO3¯ 氧化 I¯ 产生 3 倍摩尔量的 I ¯ ，而在紫外区 287nm 具最大吸收， 在 20~80µg/50ml 范围内符
合 Lambert-Beer 定律。检出限为 0.01µg/ml，相对标准偏差为 1.04%， 平均回收率为 101.5%。
关键词：紫外分光光度法；碘酸根；正交实验
Research on Measuring Iodine in Potassium Iodine with UV-spectrophotometer Determination
Huang Jun-sheng, Ren Na-ilin, Zhang Ruo-ru
(Department of Chemistry, Hanshan Teachers’ College，Chaozhou 521041)
Abstract: It is found that iodide ( IO3¯ ) formed is reacted with excess of iodide in an acidic medium to give free iodine ( I¯ ) in the ratio of
one mole of iodide ( IO3 ¯ ) giving three moles of iodine ( I3¯ ). The iodine in the solution, showing its absorption maximum at 287nm, can thus
be determined photometric in the UV-spectrum region. Lambert-Beer’s law is obeyed in the range of 20~80µg of iodide per 50ml of solution.
Detecting limit was 0.01μg/ml , relative standard deviation was 1.04% and average recove
中图分类号：O657.3；文献标识码：A；文章篇号:1007-2764(2004)03-0125-048
紫外分光光度法测定碘酸钾盐中碘的方法研究
黄俊盛 任乃林 张若茹
（韩山师范学院化学系, 潮州 521041）
3
摘 要：利用在酸性条件下，IO3¯ 氧化 I¯ 产生 3 倍摩尔量的 I ¯ ，而在紫外区 287nm 具最大吸收， 在 20~80µg/50ml 范围内符
合 Lambert-Beer 定律。检出限为 0.01µg/ml，相对标准偏差为 1.04%， 平均回收率为 101.5%。
关键词：紫外分光光度法；碘酸根；正交实验
Research on Measuring Iodine in Potassium Iodine with UV-spectrophotometer Determination
Huang Jun-sheng, Ren Na-ilin, Zhang Ruo-ru
(Department of Chemistry, Hanshan Teachers’ College，Chaozhou 521041)
Abstract: It is found that iodide ( IO3¯ ) formed is reacted with excess of iodide in an acidic medium to give free iodine ( I¯ ) in the ratio of
one mole of iodide ( IO3 ¯ ) giving three moles of iodine ( I3¯ ). The iodine in the solution, showing its absorption maximum at 287nm, can thus
be determined photometric in the UV-spectrum region. Lambert-Beer’s law is obeyed in the range of 20~80µg of iodide per 50ml of solution.
Detecting limit was 0.01μg/ml , relative standard deviation was 1.04% and average recove
紫外分光光度法测定碘酸钾盐中碘的方法研究
