Usně - Chemické stanovení obsahu oxidu chromitého - Část 3: Kvantifikace atomovou absorpční spektrometrií (Norma k přímému použití jako ČSN).

The information about the standard:

Designation standards: ČSN EN ISO 5398-3
Classification mark: 793851
Catalog number: 506158
Publication date standards: 1.2.2019
The number of pages: 20
Approximate weight : 60 g (0.13 lbs)
Country: Czech technical standard
Kategorie: Technické normy ČSN

Annotation of standard text ČSN EN ISO 5398-3 (793851):

This document describes a method for the determination of chromium in aqueous solution obtained from leather. This is an analysis for total chromium in leather; it is not compound specific or specific to its oxidation state. This method describes the determination of chromium by atomic absorption spectrometry and is applicable to leathers which are expected to have chromic oxide contents in excess of 5 mg/kg. Two techniques for the preparation of the solution to be analysed are included. In the case of disputes, the wet oxidation technique is to be used