This standard specifies two methods for the determination of calcium content in tungsten concentrates: EDTA volumetric method and flame atomic absorption spectroscopy (AAS) method, which are suitable for the determination of calcium content in the range of 1% to 20%. Methods Calcium is separated by chemical treatment and quantified by EDTA standard solution titration or flame atomic absorption spectroscopy (AAS) method. This standard provides scientific determination methods for the composition analysis and quality control of tungsten concentrates to ensure that the product mass meets the standard requirements.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | H63 | ICS | 77.120.99 |
| Release Date | 2008-03-31 00:00:00 | Implementation Date | 2008-09-01 00:00:00 |
