预包装食品中钠、碘含量及相关性

Detection and correlation between the content of sodium and iodine in pre-packaged foods

目的探讨市场上销售的预包装食品钠与碘含量的现状以及相关性分析。方法对实体超市与网络超市中224种预包装食品进行采样,根据不同标准分类,用电感耦合等离子体质谱仪检测其中的钠与碘含量,并对钠含量与碘含量做相关性分析,计算预包装食品碘盐使用率。结果在各类预包装食品中,鱼禽肉蛋类制品钠含量(M=884 mg/100 g)、碘含量(M=40.5μg/100 g),腌制类食品钠含量(M=940 mg/100 g)、碘含量(M=40.5μg/100 g),动物性食品钠含量(M=786 mg/100 g)、碘含量(M=34.9μg/100 g)均较高。主食及速食食品(动物性r=0.730,P<0.01;植物性r=0.777,P<0.01)、腌制类食品(动物性r=0.518,P<0.01;植物性r=0.973,P<0.01)中钠、碘含量相关性较强;剔除烘焙、烘烤类等容易造成碘损失的样品后,预包装食品碘盐使用率约为88.46%。结论市场上不同类别的预包装食品钠、碘含量存在差异。

OBJECTIVE To evaluate the present situation of sodium and iodine content and the correlation in pre-packaged foods in the market.METHODS After collecting samples from physical and online supermarkets,the contents of sodium and iodine of samples were detected by inductively coupled plasma mass spectrometry,SPSS 26.0 was applied to analyze the correlation between sodium and iodine and the utilization rate of iodized salt was calculated in pre-packaged foods.RESULTS Among various types of pre-packaged foods,fish,poultry,meat and egg products sodium(M=884 mg/100 g),iodine(M=40.5μg/100 g),preserved foods sodium(M=940 mg/100 g),iodine(M=40.5μg/100 g),animal foods sodium(M=786 mg/100 g),iodine(M=34.9μg/100 g)were all high in sodium and iodine content.The correlation coefficient of sodium and iodine content in staple and instant foods of animal foods was 0.730(P<0.01)and vegetable foods was 0.777(P<0.01),the preserved foods of animal foods was 0.518(P<0.01)and vegetable foods was 0.973(P<0.01).The utilization rate of iodized salt in pre-packaged foods was 88.46%after removing those samples that could cause the iodine loss,such as baked foods.CONCLUSION The sodium and iodine content in pre-packaged foods vary with different categories.