GB/T 21931.3-2008 Active
GB/T 21931.3-2008 Nickel,ferronickel and nickel alloys—Determination of phosphorus content—Phosphovanoclonolybeate molecular absorption spectrometric method
Abstract
This part of GB/T 21931 specifies the determination of phosphorus content in nickel, nickel-iron, and nickel alloys by the phosphorus vanadium molybdenum yellow spectrophotometric method. This part is applicable to the determination of phosphorus content in nickel, nickel-iron, and nickel alloys. The determination range (mass fraction): 0.000 5% to 0.05%. The interference of elements such as arsenic, chromium, hafnium, niobium, silicon, tantalum, titanium, and tungsten can be eliminated by the complexation effect and volatility (e.g., chromium). When the content of interfering elements is low, the measured phosphorus content can reach a minimum of 0.000 5% (mass fraction).
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 21931.3-2008 |
| CCS | Analysis methods for steel and iron alloys |
| ICS | Iron alloy |
| Implement Date | 2008-12-01 |