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国产食盐“添加剂”堪比砒霜?央视深度揭秘

2017-06-20 07:10:28   央视财经

中华预防医学会健康传播分会常务委员钟凯:其实最简单的判别标准,它是一种合法的食品添加剂,那么在批准它使用之前要经过很多很多科学研究和数据支持,包括了大家关心的,比如说急性毒性、慢性毒性,有没有致畸、致癌等等各种各样的毒性,全部都筛查一遍之后,没有问题才会批准它使用,所以不会有这种慢性危害,我们在批准一种添加剂的时候,已经考虑到了大家想到的长期大量吃会不会有问题。

钟凯介绍说,亚铁氰化钾是低毒物质,按照中国国家标准的规定,食盐中的抗结计以亚铁氰根计含量不得超过每公斤10毫克。

钟凯中华预防医学会健康传播分会常务委员:根据世界卫生组织和国际粮农组织专家委员会的评估数据,亚铁氰化钾要造成人健康上负面效应,至少每天,成年人可能要摄入1.5毫克,那么如果按照我们国家标准规定这个量来推算的话,相当于你每天要吃3两左右的食盐,而我们正常人一天吃的食盐能到20克的话,就已经非常非常咸了。

亚铁氰化钾在高温下可以分解产生氰化钾这种剧毒物质吗?

钟凯告诉记者,氰化钾确实是一种剧毒物质,但是它和食盐中抗结剂亚铁氰化钾完全不同。

中华预防医学会健康传播分会常务委员钟凯:亚铁氰化钾它听起来是亚铁氰化钾,但是它和氰化钾,其实差别非常大,氰化钾里面的氰根,它是可以游离出来产生毒性,在亚铁氰化钾里面,氰根是跟铁离子结合,它的结合力非常强,结合得很紧密,所以它化学性质很稳定,不会释放这种有毒的氰化物,所以它俩不是一回事,完全不是一回事,氰化钾是剧毒物,但是亚铁氰化钾它基本上就是一个低毒或者无毒的东西。

食用盐遇高温有可能会使亚铁氰化钾分解成氰化钾,这种说法正确吗?

中华预防医学会健康传播分会常务委员钟凯:这种说法肯定是不靠谱,因为亚铁氰化钾本身化学性质是非常稳定的,那如果你要让它分解,倒不是说不行,你大概需要400(摄氏)度的温度,我们在家里做饭、做菜的时候,到200(摄氏)度的时候就已经要烧焦了,所以你在家里是不可能让它分解,做菜的时候。

钟凯做了一个假设,即使食盐中亚铁氰化钾在高温的状态下,真的分解出了氰化钾,想要达到让人中毒的剂量也是完全不可能的。

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