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目的分析广州市食品中碘含量并对居民碘摄入量进行研究,为食盐加碘浓度调整提供依据。方法于2005年4—10月在广州市城区范围内各大农贸市场和超市采集包括蔬菜、水果、谷物(干品)、禽肉、畜肉、蛋品、乳品、水产品等居民日常食品,同时采集居民食盐样品30份,测定其中碘含量;采用膳食调查法分别对不同收入和职业人群的膳食结构进行调查。结果动物内脏、水产品、蛋类和牛肉等食品中碘含量较高,植物性食品碘含量较低。食盐样品平均碘含量为(31.7±6.20)mg/kg,符合我国食盐加碘标准。在不食用加碘食盐的情况下,广州市不同居民膳食碘摄入量仅占推荐摄入量的48.6%～62.2%。结论在未食用加碘盐的情况下,广州市居民碘摄入量不足。根据目前食盐中碘加入量计算,食用加碘盐后碘摄入量超出RNI,但仍然低于可耐受最高摄入量。
Objective To analyze the iodine content of food in Guangzhou and to study the iodine intake of residents, providing the basis for the adjustment of iodine concentration in salt. Methods From April to October 2005, the daily foodstuffs of residents such as vegetables, fruits, cereals (dried products), poultry meat, meat, eggs, dairy products and aquatic products were collected from major farmers’ markets and supermarkets in the urban area of Guangzhou City. Residents salt samples 30, determination of iodine content; dietary survey method were used to investigate the diet of different income and occupational groups. Results The content of iodine in animal offal, aquatic products, eggs and beef was higher and the iodine content in plant foods was lower. The average iodine content of salt samples was (31.7 ± 6.20) mg / kg, which accords with the standard of salt iodization in our country. In the case of not eating iodized salt, dietary iodine intake of different residents in Guangzhou accounted for only 48.6% ~ 62.2% of the recommended intake. Conclusion In the absence of iodized salt, Guangzhou residents do not have sufficient iodine intake. Based on the current amount of iodine added to the salt, iodine intake beyond iodized salt after consumption of iodized salt is still below the maximum tolerable intake.