The document stipulates the use of discoloration acid spectrophotometry and diantipyrine methane spectrophotometry for the determination of titanium content in ferroniobium. It is suitable for the determination of titanium content in ferroniobium, with a determination range of 0.010% to 2.50%. It is emphasized in the warning that the personnel using this document should have practical experience in formal laboratory work, because the document does not cover all possible safety issues, and the user is responsible for taking appropriate safety and health measures and ensuring compliance with the relevant national regulations. Several documents are cited in the normative reference document, including the taking and preparation of samples for chemical analysis of ferroalloys, the Precision of Measuring methods and results, the specifications and test methods for analytical laboratory water, the Spectrophotometric method for chemical analysis of metallurgical products, the general rule of spectrophotometry, the rule of numerical revision and the representation and determination of limit values, and the relevant standards for laboratory Glass instruments. The document does not deal with terms and definitions, but in Method 1 describes the principle of discoloration acid photometry, that is, through the analysis of the sample, sulfuric acid smoke, the formation of red complexes, and the measurement of Absorbance at a wavelength of 475 nm. Reagents and materials require the use of approved analytically pure reagents and compliant water.
| Status | Active |
|---|---|
| CCS | H11 | ICS | 77.100 |
| Release Date | 2023-11-27 00:00:00 | Implementation Date | 2024-06-01 00:00:00 |