GB/T 4699.2-2025 in English

This standard provides methods for determining the chromium content in products such as chromite, silicon chromium alloy, chromium nitride, and high-nitrogen chromium iron. It outlines two analytical procedures: the perchloric acid oxidation titration method and the potentiometric titration method. The procedures are designed to ensure consistency and accuracy in the measurement process. The standard specifies the necessary reagents, equipment, and operational steps required for each method. It also includes guidelines for sample preparation and data interpretation. The methods are applicable for quality control and assurance in relevant industries. The standard is structured to support reliable and reproducible results in the determination of chromium content.