GB/T 15076.4-2020 Methods for chemical analysis of tantalum and niobium—Part 4:Determination of iron content—1,10-Phenanthroline spectrophotometry (English Version)
This part of GB/T15076 specifies the 1,10-phenanthroline spectrophotometric method for the determination of iron content in tantalum and niobium. This section applies to the determination of iron content in tantalum, niobium and their hydroxides and oxides. Measuring range: >0.020%~0.50%. 2 principle
GB/T 15076.4-2020 history
2020GB/T 15076.4-2020 Methods for chemical analysis of tantalum and niobium—Part 4:Determination of iron content—1,10-Phenanthroline spectrophotometry
1994GB/T 15076.4-1994 Methods for chemical analysis of tantalum and niobium-Determination of iron content