EN ISO 5398-1:2007

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Sampling and sample preparation
6 Reagents
   6.1 Wet oxidation method
   6.2 Alkaline fusion method
   6.3 Iodometric titration
7 Apparatus
8 Methods
   8.1 Preparation of analytical solution
   8.2 Measurement of the aqueous solution
9 Calculation and expression of results
   9.1 General
   9.2 Repeatability
10 Test report
Annex A (informative) - Determination of water and other
                        volatile matter

ISO 5398-1:2007 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.