754-2IEC-3-CONTENTSPageFOREWORD5INTRODUCTION.7Clause1 Scope.92 Principle of the method93 Test apparatus93.1 Tube fumace93.2Tube93.3 Combustion boats113.4 Bubbling devices for gases113.5 Air supply system.113.6 Measuring instruments134 Conditioning of the samples135 Test pieces136 Procedure137 Determination of the pH value and conductivity157.1 Calibration of the pH meter157.2 Determination of the pH value and conductivity of the solution158 Expression of the results158.1 Mean value158.2 Weighted values159 Recommended values17Figures19
