FOOD SCIENCE ›› 2003, Vol. 24 ›› Issue (8): 114-116.

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Determination of Iodine in Iodized Salt by Spectrophotometry

 HOU  Dong-Yan, HUI  Rui-Hua, YANG  Mei, GUAN  Chong-Xin, GUO  Hua   

  • Online:2003-08-15 Published:2011-12-13

Abstract: A spectrophotometric determination of iodine by oxidation decoloration reaction of pyrocatechol violet by iodatein a strong acid medium is reported in this paper. The maximum absorbance is at 557nm. The linear range of determination is0~2.0μg/ml. The recovery is 101.2%~107.9%and the coefficient of variation is less 0.86%.

Key words: iodine determination, pyrocatechol violet, oxidation decoloration, spectrophotometry