YS/T 445.4-2019 in English

This standard specifies methods for determining the content of aluminum oxide in silver concentrate by chrome azurol S spectrophotometry and Na2EDTA titration. It outlines the applicable scope, principles, reagents, instruments, sample preparation procedures, analytical steps, and calculation methods. The standard provides detailed operational guidelines to ensure the accuracy and reliability of the analytical results. It is applicable to the chemical analysis of silver concentrate and can be used as a reference for related testing and quality control processes. The standard includes requirements for quality control and data processing, ensuring consistency and comparability of test results across different laboratories and testing environments.