EN 725-2:2007

Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Apparatus
6 Preparation of sample solution
  6.1 Sample calcination
  6.2 Test sample
  6.3 Dissolution of the test sample
7 Calibration
  7.1 Standard addition method
  7.2 Calibration method
8 Procedure
  8.1 ICP spectrometer operation
  8.2 Standard addition method
  8.3 Calibration method
9 Test report

This part of EN 725 describes a method for the determination of impurities in barium titanate powders using inductively coupled plasma optical emission spectroscopy (ICP-OES).The method is applicable only to stoichiometric barium titanate. The maximum concentrations measured for each impurity are as follows:Sr4 mg/g (4 000 ppm)Ca500 ug/g (500 ppm)K200 ug/g (200 ppm)Na, Mg, Al, Fe, Nb100 g/g (100 ppm)The minimum concentration or detection limits are from 1 ug/g to 5 ug/g (1 ppm to 5 ppm).