天津市部分市售食品碘含量分析

Analysis on iodine content of some foods marketed in Tianjin city

目的测定天津市区部分市售食品中碘含量,为天津市区碘营养水平的安全评价以及碘与硒联合作用的研究提供基础数据。方法从天津市内6区的农贸市场中采集部分市售食品,用砷铈氧化还原法进行碘含量测定。结果各类食品的碘含量分别为:蔬菜类(4.2±3.16)μg/100 g;谷物干豆类(7.6±6.15)μg/100 g;动物性食品(20.1±20.54)μg/100 g;干海带的碘含量为(4 263.6±1 895.05)μg/100 g。结论不同种类食物的碘含量不同。不同来源的同类食品样品其碘含量可能有较大的差别。食盐加碘是补充碘的重要措施。

Objective Iodine content of some foods marketed in Tianjin City was measured.That can be used as a database for the safety assessment of the iodine nutrition situation of the people living in Tianjing city and the study of the joint action of the selenium and iodine on the health.Methods The samples were collected from the markets in 6 districts of Tianjin city and the iodine content of the foods was determined using the kinetic spectrophotometry based on iodine-catalyzed Ce4＋-As3＋ redox reaction.Results The iodine content（±s） of the vegetables,cereals and dried legumes,terrestrial animals were（4.2±3.16）,（7.6±6.15） and（20.1±20.54）μg/100 g,respectively.One of the dried kelp was（4263.6±1895.05）μg/100 g.Conclusion The mean values of the food iodine content could vary with the kind of the foods.The iodine contents of specimens of the food from different source maybe different.Because of the iodine content of the dried kelp is higher about two hundred times than one of the plants and animals,so that the dried kelp is a good food adjusting the dietary iodine intake.