GB/T 17415.2-1998
Methods for chemical analysis of Tantalum and Niobium ores--Determination of Niobium content--Preconcentration and separation with silica gel--Thiocyanate extraction photometric method (English Version)
- Standard No.
- GB/T 17415.2-1998
- Language
- Chinese, Available in English version
- Release Date
- 1998
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2011-02
- Replace By
- GB/T 17415.2-2010
- Latest
- GB/T 17415.2-2010
- Scope
- This standard specifies the method for the determination of niobium content in tantalum and niobium ores. This standard applies to tantalum and niobium ores, and also applies to the determination of niobium content in lithium, rubidium and cesium ores. Measuring range: 10×10-6～1.0×10-2niobium pentoxide.
GB/T 17415.2-1998 history
- 2010 GB/T 17415.2-2010 Methods for chemical analysis of tantalum and niobium ores.Part 2:Determination of niobium content
- 1998 GB/T 17415.2-1998 Methods for chemical analysis of Tantalum and Niobium ores--Determination of Niobium content--Preconcentration and separation with silica gel--Thiocyanate extraction photometric method
