Aktívna norma | Vydaná: 21.07.1994

ISO 4581:1994-ed.2.0

Plastics — Styrene/acrylonitrile copolymers — Determination of residual acrylonitrile monomer content — Gas chromatography method
(Plastiques — Copolymeres styrene/acrylonitrile — Dosage de l´acrylonitrile monomere résiduel — Méthode par chromatographie en phase gazeuse)

Dostupné jazyky: Anglicky, Francúzsky

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Podrobné informácie

Označenie: ISO 4581:1994-ed.2.0

Dátum vydania: 21.07.1994

Stránok: 8

Krajina: Medzinárodná technická norma

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Anotácia

Description / Abstract: 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.

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