Objavljen
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.
POVUČEN
ISO 4581:1987
OBJAVLJEN
ISO 4581:1994
90.20
Početak postupka preispitivanja standarda
15. 7. 2026.
Plastične mase – Stiren/akrilonitrilni kopolimeri – Određivanje sadržaja zaostalog akrilonitrilnog monomera – Metoda gasne hromatografije
90.20 Početak postupka preispitivanja standarda
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