GB/T 4698.27-2017Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 27: Determination of neodymium content - Inductively coupled plasma atomic emission spectrometry (English PDF)
海绵钛、钛及钛合金化学分析方法 第27部分：钕量的测定 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
July 1, 2018
Scope
GB/T 4698.27-2017 is the English-translated version of 海绵钛、钛及钛合金化学分析方法 第27部分：钕量的测定 电感耦合等离子体原子发射光谱法.
GB/T 4698.27-2017 is the Chinese standard "Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 27: Determination of neodymium content - 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 neodymium in titanium sponge, titanium and titanium alloys.
Measurement range .0.10% ~ 3.00%. Its clauses include method summary; reagent; instruments; sample; analysis steps.
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Document preview — GB/T 4698.27-2017
National Standard of the People's Republic of China
- ICS
- 77.120.50
- Classification
- H 14
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 method summary
- 3 reagent
- 4 instruments
- 5 sample
- 6 Analysis steps
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 neodymium in titanium sponge, titanium and titanium alloys. Measurement range .0.10% ~ 3.00%.
2 method summary
The sample is dissolved in sulfuric acid, nitric acid is added to oxidize the titanium. Inductively coupled plasma emission spectrometers were used at the recommended analytical line wavelengths
Neodymium was measured in the test solution emission intensity, obtained by the working curve of neodymium mass concentration.
3 reagent
Unless otherwise specified, only reagents that are identified as analytically pure and laboratory-grade water are used in the analysis.
3.1
Nitric acid (p = 1.42 g/mL).
3.2
Nitric acid (1 1).
3.3
Sulfuric acid (1 1).
3.4
titanium metal (wTi >= 99.9%, wNd <= 0.001%).
3.5
neodymium standard stock solution Accurately weigh 1.1664g of neodymium oxide (wNd2O5>=99.99%) which has been fired at 850 °C for 1h,
Cup, add 40mL nitric acid (3.2), low temperature heating to dissolve completely. Remove the cooling, into 1000mL volumetric flask, diluted with water until engraved
Degree, mix well. This solution 1 mL contains 1.0 mg neodymium.
3.6
Argon (volume fraction >= 99.99%).
4 instruments
4.1
Inductively Coupled Plasma Atomic Emission Spectrometer with a resolution of less than 0.006 nm (at.200 nm).
4.2
Element Recommended Analysis wavelength 410.9nm.
5 sample
Sponge titanium, titanium and titanium alloy sampling should follow the appropriate standard method has been promulgated.
6 Analysis steps
6.1 Sample
Weigh accurately sample 0.20g (Chapter 5), accurate to 0.0001g.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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