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1.引言 碘对生命的重要性早就为人们所知,它是生命必需的微量元素之一,缺碘会严重影响人类健康。1990年9月联合国召开71国首脑参加的世界儿童会议,会议宣言提出:“全世界在2000年消除碘缺乏病”。我国是世界上碘缺乏病危害最严重的国家之一,有4.25亿人缺碘,缺碘造成的地方性甲状腺肿大病和克汀病患者有820万人,造成智力低下的儿童有800万人。采用食盐加碘供应市场是消除碘缺乏病的最有效方法。不少学者对加碘盐中碘的添加剂种类及碘在盐中的稳定性做过研究,现在选用KIO_3(碘酸钾)作碘的添加剂,并适当添加碱性物质作稳定剂。一般认为食盐中加
1. INTRODUCTION The importance of iodine for life has long been known, it is one of the trace elements essential to life, iodine deficiency can seriously affect human health. In September 1990, the United Nations convened the World Children’s Summit with the participation of 71 heads of state. The declaration of the meeting stated: “The world has eliminated iodine deficiency disorders by the year 2000.” As one of the countries with the most serious iodine deficiency disorders in the world, China has 422 million people who lack iodine, 0.1 million endemic goiter and cretinism caused by iodine deficiency, 8 million children with mental retardation . Salt iodized supply to the market is the most effective way to eliminate iodine deficiency disorders. Many scholars have studied the types of iodine additives in iodized salt and the stability of iodine in salt. KIO_3 (potassium iodate) is now used as an additive in iodine, and alkali is added as a stabilizer. Salt is generally considered Canada