GB/T 4698.1-2017Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 1: Determination of copper content - Flame atomic absorption spectrometry (English PDF)
海绵钛、钛及钛合金化学分析方法 第1部分：铜量的测定 火焰原子吸收光谱法
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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 4698.1-2017 is the English-translated version of 海绵钛、钛及钛合金化学分析方法 第1部分：铜量的测定 火焰原子吸收光谱法.
GB/T 4698.1-2017 is the Chinese standard "Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 1: Determination of copper content - Flame atomic absorption spectrometry".
Its scope clause reads: GB/T 4698 provisions of this section sponge titanium, titanium and titanium alloys in the determination of the amount of. This section applies to the determination of copper in titanium sponge, titanium and titanium alloys.
Measurement range .0.10% ~ 5.00%. Its clauses include method summary; reagent; instruments; sample.
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Document preview — GB/T 4698.1-2017
National Standard of the People's Republic of China
- ICS
- 77.120.50
- Classification
- H 14
- Replacing
- GB/T 4698.1-1996
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 method summary
- 3 reagent
- 4 instruments
- 5 sample
1 Scope
GB/T 4698 provisions of this section sponge titanium, titanium and titanium alloys in the determination of the amount of.
This section applies to the determination of copper in titanium sponge, titanium and titanium alloys. Measurement range .0.10% ~ 5.00%.
2 method summary
The sample was dissolved with hydrochloric acid and hydrofluoric acid. Nitric acid is added to oxidize titanium, and saturated boric acid is used to mask fluoride ions. Atomic Absorption Spectrometer wave
324.7nm long, the air - acetylene flame measured copper absorbance, according to the standard curve method of calculating the amount of copper.
3 reagent
Unless otherwise specified, only reagents that are identified as analytically pure and laboratory-grade water are used in the analysis.
3.1
hydrochloric acid (1 1).
3.2
Nitric acid (1 1).
Hydrofluoric acid (1 1).
3.4
saturated boric acid solution.
3.5
copper standard stock solution Weigh 1.0000g metal copper (wCu >= 99.99%) placed in 300mL beaker, add 40mL nitric acid (3.2) slightly soluble. Boil, get rid of nitrogen oxides, remove the cooling, into 1000mL volumetric flask, add 50mL of nitric acid (3.2), with
Dilute the water to the mark and mix well. This solution 1 mL contains 1.0 mg of copper.
3.6
copper standard solution Pipette 10.00mL copper standard stock solution (3.5) in 100mL volumetric flask, add 10mL of nitric acid (3.2), with
Dilute the water to the mark and mix well. This solution 1mL containing 100µg copper.
4 instruments
Atomic absorption spectrometer with copper hollow cathode lamp.
Under the instrument working conditions, any atomic absorption spectrometer that can achieve the following indexes can be used.
--- Characteristic concentration. In the same solution with the sample solution of the matrix, the characteristic concentration of copper should not exceed 0.08µg/mL;
--- Precision. With the highest concentration of standard solution measured 10 times the absorbance, the standard deviation should not exceed 1.0% of the average absorbance;
The 10 absorbances measured with the lowest concentration standard solution (not the "zero" standard solution) should not exceed the standard deviation of the highest concentration
Degree of standard solution 0.5% of the average absorbance;
--- The working curve of the linear. The working curve according to the concentration is divided into five, the highest segment of the absorbance difference and the lowest segment of the absorbance difference
Ratio, should not be less than 0.70.
5 sample
Sponge titanium, titanium and titanium alloy sampling should follow the standard methods have been promulgated.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of GB/T 4698.1
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4698.1-2017 | Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 1: Determination of copper content - Flame atomic absorption spectrometry | current edition | Current |
| GB/T 4698.1-1996 | Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 1: Determination of copper content - Flame atomic absorption spectrometry | previous edition | Superseded |
This page sells the current edition, GB/T 4698.1-2017. Earlier editions are listed for reference only.
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Related Standards
GB/T 4698.10-2020 — Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 10: Determination of chromium content - Ammonium ferrous sulfate titration and inductively coupled plasma atomic emission spectrometry (with vanadium)
GB/T 4698.11-1996 — Sponge titanium，titanium and titanium alloys--Determination of chromium content in the absence of Vanadium--Ammonium ferrous sulfate titration method
GB/T 4698.12-2017 — Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 12: Determination of vanadium content - Ammonium ferrous sulfate titration and inductively coupled plasma atomic emission spectrometry
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