YS/T 568.4-2006 Determination of Aluminum Content in Zirconia and Hafnium Oxide Absorptiometry of Chromazurin S-Tetradecylpyridinium Chloride (English Version)
2008YS/T 568.4-2008 Chemical analysis methods for zirconium oxide and hafnium oxide.Determination of aluminium content.Chronic azurol-S-tetradrcylpyridine chloride spectrophotometric method
2006YS/T 568.4-2006 Determination of Aluminum Content in Zirconia and Hafnium Oxide Absorptiometry of Chromazurin S-Tetradecylpyridinium Chloride