| 邻氯酚红褪色分光光度法测定食盐中碘的含量 |
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| 引用本文： | 马占玲,曾凌.邻氯酚红褪色分光光度法测定食盐中碘的含量[J].安徽农业科学,2009,37(21):9847-9848. |
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| 作者姓名： | 马占玲 曾凌 |
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| 作者单位： | 渤海大学化学化工学院商检教研室,辽宁锦州,121013;渤海大学化学化工学院商检教研室,辽宁锦州,121013 |
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| 摘 要： | 介绍了加碘盐中碘含量测定的新的光谱分析法，其原理是：借助于盐酸介质，在溴化钾催化下，碘酸根氧化邻氯酚红使其褪色，褪色前后的吸光度之差△A与碘含量成正比。试验结果表明：邻氯酚红在波长505nm处有强吸收，碘含量在0～60μg／rIll范围内呈线性关系，方法的相对标准偏差〈0．82％，回收率为101．4％～102．5％。
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| 关 键 词： | 光谱法 碘的测定 邻氯酚红 加碘盐 |
Spectrophotometric Determination of Iodine Content in Salt with the Fading Reaction of Chlorophenol Red |
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| MA Zhan-ling et al.Spectrophotometric Determination of Iodine Content in Salt with the Fading Reaction of Chlorophenol Red[J].Journal of Anhui Agricultural Sciences,2009,37(21):9847-9848. |
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| Authors: | MA Zhan-ling |
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| Institution: | MA Zhan-ling et al (Faculty of Chemistry , Chemical Engineering,Bohai University,Jinzhou,Liaoning 121013) |
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| Abstract: | A new spectrophotometric method for the determination of iodine content in salt was developed, based on the reaction of iodate with chlorophenol red in HCl medium.There is a strong absorption of chlorophenol red at 505 nm .There is a linear correlation in the f iodine content range of 0-60 μg/ml.The relative standard deviation is less 0.82% and the recovery is 101.4%-102.5%. |
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| Keywords: | Spectrophotometry Iodine content determination Chlorophenol red Iodized salt |
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