GB/T 4698.6-2019Methods for chemical analysis of titanium sponge,titanium and titanium alloys - Part 6:Determination of boron content - Methylene blue 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6部分：硼量的测定 次甲基蓝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
October 18, 2019
Implementation date
September 1, 2020
Scope
GB/T 4698.6-2019 is the English-translated version of 海绵钛、钛及钛合金化学分析方法 第6部分：硼量的测定 次甲基蓝分光光度法和电感耦合等离子体原子发射光谱法.
GB/T 4698.6-2019 is the Chinese standard "Methods for chemical analysis of titanium sponge,titanium and titanium alloys - Part 6:Determination of boron content - Methylene blue spectrophotometry and inductively coupled plasma atomic emission spectrometry".
Its scope clause reads: This part of GB/T 4698 specifies the determination of boron content in titanium, titanium and titanium alloys. This section applies to the determination of boron content in titanium, titanium and titanium alloys.
Method 1 measurement range. 0.0020%~0.10%, method 2 Measuring range. 0.0010%~0.200%. When the measurement ranges overlap, the method 1 of this part is an arbitration analysis method. Its clauses include samples; method 1.
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Document preview — GB/T 4698.6-2019
National Standard of the People's Republic of China
- ICS
- 77.120.50
- Classification
- H 14
- Replacing
- GB/T 4698.6-1996
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 samples
- 4 Method 1
1 Scope
This part of GB/T 4698 specifies the determination of boron content in titanium, titanium and titanium alloys.
This section applies to the determination of boron content in titanium, titanium and titanium alloys. Method 1 measurement range. 0.0020%~0.10%, method 2
Measuring range. 0.0010%~0.200%. When the measurement ranges overlap, the method 1 of this part is an arbitration analysis method.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 31981 Titanium and titanium alloy chemical composition analysis sample preparation method
3 samples
3.1 Sampling
Sampling of titanium sponge, titanium and titanium alloy shall be carried out in accordance with GB/T 31981.
3.2 Sample processing
The sample was cut into pieces having a length of not more than 5 mm.
4 Method 1
methine blue spectrophotometry
4.1 Principle
The sample was dissolved with hydrofluoric acid, and hydrogen peroxide was used to oxidize titanium. Boron and hydrofluoric acid form fluoroborate complex ions in an acidic solution, followed by methine
Blue formed a green complex, which was extracted with 1,2-dichloroethane, and its absorbance was measured at a wavelength of 660 nm of a spectrophotometer.
4.2 Reagents
Only analytically pure reagents and laboratory secondary water were used in the analysis unless otherwise stated.
4.2.1
Metal titanium (wTi >= 99.9%, wB < 0.0002%).
4.2.3
Hydrogen peroxide (rho = 1.10 g/mL).
4.2.4 Hydrofluoric acid (5 3)
Stored in a polyethylene bottle.
4.2.5
Sulfuric acid..200mL sulfuric acid (rho=1.84g/mL, excellent grade pure) was injected into the platinum dish, and 10mL hydrofluoric acid (rho=1.15g/mL) was added.
......
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 4698.6
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4698.6-2019 | Methods for chemical analysis of titanium sponge,titanium and titanium alloys - Part 6:Determination of boron content - Methylene blue spectrophotometry and inductively coupled plasma atomic emission spectrometry | current edition | Current |
| GB/T 4698.6-1996 | Methods for chemical analysis of titanium sponge,titanium and titanium alloys - Part 6:Determination of boron content - Methylene blue spectrophotometry and inductively coupled plasma atomic emission spectrometry | previous edition | Superseded |
This page sells the current edition, GB/T 4698.6-2019. Earlier editions are listed for reference only.
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Related Standards
GB/T 4698.7-2011 — Methods for chemical analysis of titanium sponge,titanium and titanium alloys - Determination of oxygen and nitrogen content
GB/T 4698.5-2017 — Methods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 5: Determination of molybdenum content - Thiocyanate spectrophotometry and inductively coupled plasma atomic emission spectrometry
GB/T 4698.8-2017 — Methods for chemical analysis of titanium sponge, titanium and titanium alloys—Part 8: Determination of aluminum content—Separation with sodium hydroxide-EDTA complex-metric titration and inductively coupled plasma atomic emission spectrometry
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