ČSN 640758 (640758)

Plastics. Determination of hydrogen cyanide in combustion products of plastics



STANDARD published on 16.3.1979


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The information about the standard:

Designation standards: ČSN 640758
Classification mark: 640758
Catalog number: 4702
Publication date standards: 16.3.1979
SKU: NS-131801
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

The category - similar standards:

Plastics

Annotation of standard text ČSN 640758 (640758):

Norma platí pro stanovení kyanovodíku ve zplodinách hoření plastů metodou spektrofotometrickou. Podstata zkoušky: Vzorek se spálí a vzniklé spalné produkty se jímají v roztoku hydroxidu sodného, kde se vzniklý kyanovodík absorbuje za vzniku kyanidového iontu. Ten se převede na komplexní ion kyanonikelnatý, který se stanoví spektrofotometricky v UV oblasti. Postup při provádění normalizované zkoušky je podrobně popsán. ČSN 64 0758 byla schválena 16.3.1979 a nabyla účinnosti od 1.3.1980

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