Determination of Iodine in Eggs by Indirect Atomic Absorption Spectrometry

doi:10.7506/spkx1002-6630-201212050

Abstract

Abstract: A new method to determine iodine in eggs by indirect atomic absorption spectrometry (AAS) was established. Based on the reduction of Cu2+ by ascorbic acid to Cu+ for precipitation between Cu+ and I－, Cu residue in the supernatant was determined and calculated to obtain iodine content in eggs. The reaction was carried out using 0.8 mL of 1000 μg/mL ascorbic acid solution in pH 4.0 potassium hydrogen phthalate buffer at 30 ℃, and the centrifugation time was 10 min. This method was simple and rapid and had a wide linear range. The detection limit was 1.0 μg/mL. Satisfying results were obtained in the determination of iodine in actual samples by this method.

Key words: indirect atomic absorption spectrometry, egg, iodine

CLC Number:

O657.31

CHEN Li-juan，FENG Ling，LUO Di，LIU Sha，YAO Cheng-wei，HUANG Bao-mei. Determination of Iodine in Eggs by Indirect Atomic Absorption Spectrometry[J]. FOOD SCIENCE, 2012, 33(12): 247-249.

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Determination of Iodine in Eggs by Indirect Atomic Absorption Spectrometry

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