当丙烯腈含量少于或等于30%时用CFR181.32;当含量大于30%时用CFR171.1020.

一般现在都按照180.22做。按照177.1020做的话绝大部分ABS都会因为单体残留超标而不合格。实际上177.1020有点类似我国ABS的国家标准。180.22则类似欧盟的迁移量。欧盟对ABS中的丙烯腈也没有残留限量要求，只对丁二烯有限量要求。

实际上，可以理解，丙烯腈残留超标并不一定意味着会造成食品安全问题。只有迁移出来的丙烯腈超标才会产生直接的质量问题。当然建议测试时的条件从严。

180有这么一段话：Substances having a history of use in food for human consumption or in food contact surfaces may at any time have their safety or functionality brought into question by new information that in itself is not conclusive. An interim food additive regulation for the use of any such substance may be promulgated in this subpart when new information raises a substantial question about the safety or functionality of the substance but there is a reasonable certainty that the substance is not harmful and that no harm to the public health will result from the continued use of the substance for a limited period of time while the question raised is being resolved by further study.

原来是这样，刚刚在百度，竟然在论坛就有，哈哈

那么，请问，检测丙烯腈迁移量时，若ABS为非容器，那么如何浸泡呢？

剪成小片 按面积加浸泡液

美国方法 是什么比例 面积 体积 比 谢谢