Foreword
Introduction
Scope
Normative references
Terms and definitions
Principle
Reagents
Apparatus and equipment
Sampling and preparation of sample
Procedure
Soaking in salted water
Calibration of the pH-electrodes
Measurement
Calculation
Precision
Repeatability
Reproducibility
Comparison of results obtained using and
Test report
Preparation of standard buffer solutions (informative)
General
Buffer solution of pH 4,0
Buffer solution of pH 6,9
Buffer solution of pH 9,2
Comparison of results between and and (informative)
Bibliography