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See Chinese contents: GB/T 14849.3-2020 GB/T 14849.3-2020: Methods for chemical analysis of silicon metal -- Part 3: Determination of calcium content
This Part of GB/T 14849 specifies the method for determination of calcium content in silicon metal. This Part is applicable to determination of calcium content in silicon metal. The range for determination is: 0.0050%~0.55%.
