ISO 4581:1994 塑料.苯乙烯/ 丙烯腈共聚物.剩余的丙烯腈单体含量的测定.气相色谱法

标准编号：ISO 4581:1994

中文名称：塑料.苯乙烯/ 丙烯腈共聚物.剩余的丙烯腈单体含量的测定.气相色谱法

英文名称：Plastics — Styrene/acrylonitrile copolymers — Determination of residual acrylonitrile monomer content — Gas chromatography method

发布日期：1994-08

标准范围

规定方法的原理是将试验部分溶解在二甲基甲酰胺中，并将少量溶液注入配备有火焰离子化检测器的气相色谱仪中，以分离和检测挥发性成分。溶剂中含有已知量的丙腈或乙腈，作为定量评估的内标。使用该方法，共聚物中丙烯腈的检测下限预计为3 ppm左右。为了获得0.3 ppm至0.4 ppm的检测下限，附录a中规定了一种替代方法。

The principle of the method specified is dissolving a test portion in dimethylformamide and injecting a small volume of the solution into a gas chromatograph equipped with flame ionization detector to separate and detect the volatile components. The solvent contains a known amount of propionitrile or acetonitrile as an internal standard for quantitative evaluation. With this method, a lower detection limit of the order of 3 ppm of acrylonitrile in the copolymer may be expected. To obtain a lower detection limit of the order of 0,3 ppm to 0,4 ppm, an alternative method is specified in annex A.

标准预览图