Sample Preparation of Electronic Device Components for Hexavalent Chromium Analysis by IEC Method 62321-7-2:2017

Introduction

The recent passage of IEC 62321-7-2:2017 provides determination of hexavalent chromium in polymers and electronics using colorimetric determination by a UV-Vis Spectrophotometer. Prior to analysis, a sample preparation method using microwave digestion is used. The IEC method has several post digestion steps and requires multiple reagents to be made up prior to the procedure. This application note will establish the correct microwave equipment, options, and program to be followed in order to be in compliance with the method. It will also attempt to make the method easier to follow by alerting the analyst to make up specific reagents prior to starting the procedure.