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GB/T 4699.3-2007 Active
GB/T 4699.3-2007 Ferrochromium, silicochromium and nitrogen-bearing ferrochromium—Determination of phosphorus content—Molybdobismuthylphosphoric blue spectrophotometric method and the molybdenum blue spectrophotometric method
Abstract
This part of GB/T 4699 specifies the determination of phosphorus content by the bismuth phosphomolybdate spectrophotometry and molybdate spectrophotometry methods. This part is applicable to the determination of phosphorus content in chromium iron, vacuum micro-carbon chromium iron, nitrided chromium iron, and silicon-chromium alloys. The determination range (mass fraction) of bismuth phosphomolybdate spectrophotometry is 0.008%~0.080%; the determination range (mass fraction) of molybdate spectrophotometry is <0.15%.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 4699.3-2007 |
| CCS | Analysis methods for steel and iron alloys |
| ICS | Iron alloy |
| Implement Date | 2008-04-01 |
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