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液态奶和奶粉的质量安全知识

发布时间:2019-09-20 14:14:51

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  三鹿婴幼儿奶粉受污染重大食品安全事故引起了广大消费者对液态奶和奶粉质量安全的关注。在此对液态奶和奶粉的质量安全知识介绍如下:

  1、三聚氰胺及其对人体的危害

  三聚氰胺是一种有机化工原料,主要用来生产化工产品三聚氰胺甲醛树脂,同时还可用来做阻燃剂、减水剂、甲醛清洁剂。它具有低毒性,但进入人体沉积后,可造成泌尿系统结石,因此不允许加入食品中。因为常规检验含量的方法为“凯氏定氮法”,它通过检测含氮量来计算蛋白质含量。蛋白质的含氮量为16%,而三聚氰胺的含氮量为66.7%,不法分子则通过加三聚氰胺的手段来增加食品中虚假的蛋白质含量。任何食品中是不允许加三聚氰胺的。最近卫生部等五部门联合发文后规定:婴幼儿配方乳粉中三聚氰胺的限量值为1mg/kg,高于1mg/kg的产品一律不得销售。液态奶(包括原料乳)、奶粉、其他配方乳粉中三聚氰胺的限量值为2.5mg/kg,高于2.5mg/kg的产品一律不得销售。含乳15%以上的其他食品中三聚氰胺的限量值为2.5mg/kg,高于2.5mg/kg的产品一律不得销售。

  2、购买奶制品要看标签

  食品标签按GB7718-2004标准要求应强制标注以下内容:食品名称、配料清单、净含量、生产者名称和地址、生产日期和保质期、执行的标准编号;对液态奶和奶粉还必须标明蛋白质、脂肪;液态奶还应加标脂乳固体。以复原乳为原料的产品应标明复原乳。

  液态奶和含乳饮料的区别看其蛋白质含量,液态奶蛋白质大于3%,而含乳饮料蛋白质在1%左右。

  3、标准规定的感官鉴别方法

  液态奶:为乳白色或稍带微黄色,无沉淀、无凝块,有特有的乳香味、无异味。

  奶 粉:色泽均匀一致,呈淡黄色,粉粒大小均匀,手感疏松,无结块,无杂质,有纯正乳香滋味,无异味。

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