Method 452D describes a procedure for determining the pH of a hot water extract of a powdered sample of a polyolefin. Method 452E describes a procedure for determining the percentage of water-soluble sulphates in the hot water extract of a polyolefin. Method 452F describes a procedure for determining the percentage of water-soluble chlorides in the hot water extract of a polyolefin.
BS 2782-4 Methods 452D to 452F-1978由英国标准学会 GB-BSI 发布于 1978-01-31,并于 1978-01-31 实施。
BS 2782-4 Methods 452D to 452F-1978 在中国标准分类中归属于: G31 合成树脂、塑料基础标准与通用方法,在国际标准分类中归属于: 83.080.20 热塑性塑料。
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