食品科学 ›› 2005, Vol. 26 ›› Issue (10): 179-180.
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徐茂蓉
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XU Mao-Rong
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摘要: 本文研究了在硫酸介质中,碘酸根氧化铬黑T使其褪色的最佳条件,建立了测定微量碘的新方法。通过实验,测得最大吸收波长为510nm,碘测定碘的线性范围为0~1.0mg/L。本方法的相对标准偏差为0.24%~0.28%;回收率为98.7%~103.6%。用于测定食盐中微量碘,结果令人满意。
关键词: 铬黑T, 碘, 氧化褪色, 分光光度法
Abstract: A new method has been developed for determination of the trace iodine by oxidation-decoloration with Eriochrome black T. The color system had a maximum absorption at 510nm in the medium of sulfuric acid. Beer’s law was obeyed in the range of 0~1.0mg/L of iodine. The relative standard deviation was in the range of 0.24%~0.28%. The recovery was 98.7%~ 103.6%. The method could be used for determination of the trace iodine in salts.
Key words: eriochrome black T, iodine, oxidation-decoloration spectrophotometry
徐茂蓉. 铬黑T氧化褪色光度法测定食盐中微量碘[J]. 食品科学, 2005, 26(10): 179-180.
XU Mao-Rong. Spectrophotometric Determination of Iodine in the Salts by Oxidation-Decoloration of Eriochrome Black T[J]. FOOD SCIENCE, 2005, 26(10): 179-180.
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