SN/T 5350.1-2021 《Determination of sulfur acidity by automatic potentiometric titration》 Related products

This document specifies the potential Titrimetric method for the determination of acidity in sulfur. It is suitable for the determination of acidity content in sulfur in the range of 0.001% to 0.015%. Normative reference documents include the preparation of standard solutions and impurity standard solutions, solid product standards for industrial sulfur, specifications and test methods for analytical laboratory water, and automatic Potentiometric titrator standards. The method summary includes the extraction of acidic substances in sulfur with water-Isopropanol mixture, followed by titration with sodiumhydrate standard titration solution, and the endpoint is determined according to the potential leap. The reagents used include Isopropanol, potassium phthalic acid and sodiumhydrate, and should be of superior purity.