GB/T 4372.6-2014Methods for chemical analysis of zincoxide produced by direct process - Part 6: Testing of metallic zinc (English PDF)
直接法氧化锌化学分析方法 第6部分：金属锌的检验
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 5, 2014
Implementation date
August 1, 2015
Scope
GB/T 4372.6-2014 is the English-translated version of 直接法氧化锌化学分析方法 第6部分：金属锌的检验.
GB/T 4372.6-2014 is the Chinese standard "Methods for chemical analysis of zincoxide produced by direct process - Part 6: Testing of metallic zinc". Its scope clause reads: GB/T 4372 provisions of this part of the test method zinc oxide direct method zinc metal.
This section applies to zinc oxide direct method zinc test. The detection limit is. metallic zinc >=0.065%; aluminum >=0.008%. Its clauses include method summary; reagents; instrument; sample; test report.
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Document preview — GB/T 4372.6-2014
National Standard of the People's Republic of China
- ICS
- 77.120.60
- Classification
- H 13
- Replacing
- GB/T 4372.6-2001
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Method summary
- 3 Reagents
- 4 Instrument
- 5 Sample
- 7 Test report
1 Scope
GB/T 4372 provisions of this part of the test method zinc oxide direct method zinc metal.
This section applies to zinc oxide direct method zinc test. The detection limit is. metallic zinc >=0.065%; aluminum >=0.008%.
2 Method summary
After the sample was mixed with sodium hydroxide and anthraquinone solution into a paste, heating. As a sample containing metallic zinc is showing red wine spots, in order to
Inspection of zinc metal present. Aluminum also has the same reaction, so the results of this test method for metallic zinc, metallic aluminum combined amount. Sulfite,
Sulfide, thiosulfate, iron and other metals do not affect the test.
3 Reagents
3.1
anthraquinone (prior to use pulverized in a mortar).
3.2
Sodium hydroxide solution (200g/L).
4 Instrument
30mL glass dish, the bottom diameter of about 50mm.
5 Sample
5.1
Sample size should be less than 0.10mm.
5.2
Sample advance after 100 °C ~ 105 °C drying 2h, placed in a desiccator, cool to room temperature.
Step 6 test 6.1 Weigh 10.0g sample.
6.2
The sample is placed in a glass dish and dried, was added 0.10g anthraquinone (3.1), stir with a glass rod. Hydrogen was added 13mL ~ 15mL
Sodium hydroxide solution (3.2). Now tune into a paste with a glass rod and placed on a water bath heating 2min.
6.3 determination
6.3.1
If there is no identifiable red spots exist, the penalty for non-presence of metallic zinc.
6.3.2
If when the recognizable red spots, immediately count the number of spots on the surface, the total number of spots is greater than or equal to 50 spots should be judged as having
Presence of metallic zinc, less than 50 spots still judged as no presence of metallic zinc.
7 Test report
This chapter shall include test reports content. Shall be given at least the following aspects.
......
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 4372.6
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4372.6-2014 | Methods for chemical analysis of zincoxide produced by direct process - Part 6: Testing of metallic zinc | current edition | Current |
| GB/T 4372.6-2001 | Methods for chemical analysis of zincoxide produced by direct process - Part 6: Testing of metallic zinc | previous edition | Superseded |
This page sells the current edition, GB/T 4372.6-2014. Earlier editions are listed for reference only.
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Related Standards
GB/T 4372.7-2014 — Methods for chemical analysis of zinc oxide produced by direct process - Part 7: Determinantion of ferric oxide content - Flame atomic absorption spectrometry method
GB/T 4372.5-2001 — Methods for chemical analysis of zinc oxide produced by direct process - Determination of zinc oxide manganese content - Atomic absorption spectrometry method
GB/T 4372.5-2014 — Methods for chemical analysis of zinc oxide produced by direct process - Part 5: Determination of manganese content - Flame atomic absorption spectrometry method
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