Usně - Chemické stanovení obsahu oxidu chromitého - Část 1: Kvantifikace titrací (Norma k přímému použití jako ČSN).

The information about the standard:

Designation standards: ČSN EN ISO 5398-1
Classification mark: 793851
Catalog number: 506157
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 5398-1 (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 chrome by iodometric titration and is to be applicable to chromium-tanned leathers which are expected to have chromic oxide contents in excess of 0,3 %. Two different methods are described as alternatives for obtaining chromium in a suitable solution. It is appropriate to use either method