GB/T 4698.24-2017Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 24: Determination of nickel content - Dimethylglyoxime spectrophotometry and inductively coupled plasma atomic emission spectrometry (English PDF)
海绵钛、钛及钛合金化学分析方法 第24部分：镍量的测定 丁二酮肟分光光度法和电感耦合等离子体原子发射光谱法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 29, 2017
Implementation date
April 1, 2018
Scope
GB/T 4698.24-2017 is the English-translated version of 海绵钛、钛及钛合金化学分析方法 第24部分：镍量的测定 丁二酮肟分光光度法和电感耦合等离子体原子发射光谱法.
GB/T 4698.24-2017 is the Chinese standard "Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 24: Determination of nickel content - Dimethylglyoxime spectrophotometry and inductively coupled plasma atomic emission spectrometry".
Its scope clause reads: GB/T 4698 provisions of this section sponge titanium, titanium and titanium alloy in the determination of the amount.
This section applies to the determination of nickel sponge titanium, titanium and titanium alloys, the method of a determination of the range of 0.10% to 2.00%, the second method of measurement Wai .0.010% ~ 2.00%.
Method two is the method of arbitration analysis. Its clauses include method dimethylglyoxime spectrophotometry.
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Document preview — GB/T 4698.24-2017
National Standard of the People's Republic of China
- ICS
- 77.120.50
- Classification
- H 14
- Replacing
- GB/T 4698.24-1996
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Method Dimethylglyoxime spectrophotometry
- 2.1 Method summary
- 2.2 Reagents
- 2.3 Instruments
- 2.4 sample
1 Scope
GB/T 4698 provisions of this section sponge titanium, titanium and titanium alloy in the determination of the amount.
This section applies to the determination of nickel sponge titanium, titanium and titanium alloys, the method of a determination of the range of 0.10% to 2.00%, the second method of measurement
Wai .0.010% ~ 2.00%. Method two is the method of arbitration analysis.
2 Method Dimethylglyoxime spectrophotometry
2.1 Method summary
The sample is dissolved with sulfuric acid, the main body of titanium is masked with citric acid, and bromine water is used as oxidant. In the ammonia medium, nickel and diacetyldimethoxime form a red coloration
The absorbance of the compound was measured at a spectrophotometer wavelength of 540 nm.
2.2 Reagents
Unless otherwise specified, only reagents that are identified as analytically pure and laboratory-grade water are used in the analysis.
2.2.1
Nitric acid (p = 1.42 g/mL).
2.2.2
Ammonia (rho = 0.90 g/mL).
2.2.3
Sulfuric acid (1 1).
2.2.4
saturated bromine water.
2.2.5
citric acid solution (200g/L).
2.2.6 dimethylglyoxime ethanol solution (2g/L)
Weigh 0.5g of dimethylglyoxime dissolved in 250mL of ethanol.
2.2.7
nickel standard stock solution Weigh 1.0000g nickel metal (wNi >= 99.99%) in 250mL beaker, add 10mL nitric acid (2.2.1), 10mL water, heated to dissolve. Add 5mL sulfuric acid (rho = 1.84g/mL), heated to take sulfuric acid smoke, slightly cold, add 30mL
Water, mix, cool. Into a 1000mL volumetric flask, diluted with water to the mark, mix well. 1 mL of this solution contains 1 mg of nickel.
2.2.8
nickel standard solution Pipette 50.00mL nickel standard stock solution (2.2.7) in 500mL volumetric flask, diluted with water to the mark, mixed uniform. This solution 1 mL contains 100 µg of nickel.
2.3 Instruments
Spectrophotometer.
2.4 sample
In accordance with the promulgated sponge titanium, titanium and titanium alloy take sample preparation standards.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Editions of GB/T 4698.24
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4698.24-2017 | Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 24: Determination of nickel content - Dimethylglyoxime spectrophotometry and inductively coupled plasma atomic emission spectrometry | current edition | Current |
| GB/T 4698.24-1996 | Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 24: Determination of nickel content - Dimethylglyoxime spectrophotometry and inductively coupled plasma atomic emission spectrometry | previous edition | Superseded |
This page sells the current edition, GB/T 4698.24-2017. Earlier editions are listed for reference only.
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