FOOD SCIENCE ›› 2007, Vol. 28 ›› Issue (2): 281-283.

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Determination of Iodine from the Kelp with Water-soluble Polymer Extraction by Spectrophotometry

 DU  Jian-Zhong, LI  Qian, LUO  Mu-Yan, HU  Yuan-Jie   

  1. Department of Chemistry, Zhanjiang Normal College, Zhanjiang 524048, China
  • Online:2007-02-15 Published:2011-12-31

Abstract: I- was obtained from the kelp by alkali fusiou and then oxidized by NaNO2 in acidic solution. I2 could be extracted by polyethylene glycol -4000 in inorganic salts water solution. Iodine was coupled with malachite green and produced a blue complex. The Iodine was determined by spectrophotometry. The linear range for determination of Iodine is 8.0~65μg/ml. The recovery was 87% ~112%.

Key words: Iodine, polymer, spectrophotometry