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YS/T 575.11-2007: Methods for chemical analysis of bauxite. Part 11: Determination of chromium oxide content. Flame atomic absorption spectrophotometric method
Status: Valid YS/T 575.11: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| YS/T 575.11-2007 | English | 199 |
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Methods for chemical analysis of bauxite. Part 11: Determination of chromium oxide content. Flame atomic absorption spectrophotometric method
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YS/T 575.11-2007
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| YS/T 575.11-2006 | English | 319 |
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Methods for chemical analysis of bauxite. Determination of chromium oxide content. Flame atomic absorption spectrophotometric method
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YS/T 575.11-2006
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Basic data | Standard ID | YS/T 575.11-2007 (YS/T575.11-2007) | | Description (Translated English) | Methods for chemical analysis of bauxite. Part 11: Determination of chromium oxide content. Flame atomic absorption spectrophotometric method | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | Q52;D42 | | Classification of International Standard | 71.100.10 | | Word Count Estimation | 6,626 | | Date of Issue | 2007-11-14 | | Date of Implementation | 2008-05-01 | | Older Standard (superseded by this standard) | YS/T 575.11-2006 | | Regulation (derived from) | NDRC Notice No. 77 of 2007 | | Issuing agency(ies) | National Development and Reform Commission | | Summary | This standard specifies the bauxite ore of chromium trioxide method for determination. This standard applies to bauxite in chromium oxide content. Measuring range: 0. 005 to 0. 200%. | YS/T 575.11-2007: Methods for chemical analysis of bauxite. Part 11: Determination of chromium oxide content. Flame atomic absorption spectrophotometric method
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Methods for chemical analysis of bauxite.Part 11. Determination of chromium oxide content.Flame atomic absorption spectrophotometric method
ICS 71.100.10
Q52
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 575.11-2006
Methods for chemical analysis of bauxite -
Part 11. Determination of chromium oxide content
Flame Atomic Absorption Spectrometry
Posted 2007-11-14
2008-05-01 implementation
National Development and Reform Commission issued
Foreword
YS/T 575-2007 "chemical analysis of bauxite -" Is the YS/T 575-2006 (formerly GB/T 3257-1999) amendments
A total of 24 parts.
--- Part 1. aluminum oxide content - EDTA titration
--- Part 2. silica content - Gravimetric - molybdenum blue spectrophotometry
--- Part 3. Determination of silica content molybdenum blue photometric
--- Part 4. iron oxide content - Potassium dichromate titration
--- Part 5. Determination of iron oxide content phenanthroline spectrophotometry
--- Part 6. Determination of titanium dioxide content di Zhao DAM spectrophotometry
--- Part 7. calcium oxide content - Flame Atomic Absorption Spectrometry
--- Part 8. magnesium oxide content - Flame Atomic Absorption Spectrometry
--- Part 9. potassium hydroxide, sodium oxide content - Flame Atomic Absorption Spectrometry
--- Part 10. Determination of manganese oxide content by flame atomic absorption spectrometry
--- Part 11. chromium oxide content - Flame Atomic Absorption Spectrometry
--- Part 12. Determination of vanadium pentoxide content of benzoyl phenylhydroxylamine photometric method
--- Part 13. Determination of zinc content by flame atomic absorption spectrometry
--- Part 14. Determination of total rare earth oxide Tribromoarsenazo spectrophotometry
--- Part 15. Determination of gallium oxide content of rhodamine B extraction spectrophotometry
--- Part 16. Determination of phosphorus pentoxide molybdenum blue photometric
--- Part 17. Determination of sulfur content - Combustion - iodometric method
--- Part 18. Determination of total carbon content - Combustion - non-aqueous titration
--- Part 19. Determination of burning weight reduction method
--- Part 20. pre-dried sample preparation
--- Part 21. Determination of organic carbon titration
--- Part 22. Analysis of samples moisture intrudes content - Gravimetric method
--- Part 23. Determination of the chemical composition of the X-ray fluorescence spectrometry
--- Part 24. Determination of carbon and sulfur content infrared absorption method
This is Part 11.
The partial replacement of YS/T 575.11-2006 (formerly GB/T 3257.11-1999).
This section is amended to YS/T 575.11-2006, compared with YS/T 575.11-2006, the main changes are as follows.
--- The drying temperature of the sample unified 110 ℃ ± 5 ℃;
--- Increased precision.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This part of the Aluminum Corporation of China Zhengzhou Research Institute is responsible for drafting.
This section drafted by the Aluminum Corporation of China Guizhou Branch.
The main drafters of this section. Wang Baosheng, Zhangpei Yu, Xu Jihong.
The non-ferrous metal part by the National Standardization Technical Committee responsible for the interpretation.
This part of the standard replaces the previous editions are.
--- YS/T 575.11-2006 (formerly GB/T 3257.11-1999).
Methods for chemical analysis of bauxite -
Part 11. Determination of chromium oxide content
Flame Atomic Absorption Spectrometry
1 Scope
This section specifies the determination method in bauxite chromium oxide content.
This section applies to the determination of bauxite chromium oxide content measurement range. 0.005% to 0.200%.
2 principle of the method
Sample melted with sodium hydroxide and sodium peroxide decomposition in sulfuric acid and a small amount of potassium permanganate, an anion exchange resin points
From interfering elements such as aluminum, followed by reduction of ascorbic acid eluent and the elution of trivalent chromium in the air - acetylene flame at three wavelength 357.9nm
Determination of chromium oxide.
3 Reagents
3.1 sodium hydroxide.
3.2 sodium peroxide.
3.3 hydrochloric acid (0.5mol/L).
3.4 sulfuric acid (1 + 1). adding potassium permanganate solution (3.7) to pink.
3.5 Sodium hydroxide solution [1mol/L].
3.6 osmium sodium.
Weigh 0.5g of osmium tetroxide (spectroscopically pure) was dissolved in 500mL sodium hydroxide solution (3.5) in. An aliquot of the solution was diluted with water dubbed
Solution of 0.2g/L of.
3.7 potassium permanganate solution (1g/L).
3.8 potassium permanganate bath. 0.5mL per 100mL of water containing potassium permanganate solution (3.7).
3.9 eluent. 0.5g to 0.5g of ascorbic acid and sodium sulfate dissolved in 100mL of hydrochloric acid (3.3), and the time is now equipped with.
3.10 standard chromium oxide stock solution
Weigh 1.9335g accurate to 0.0001g, previously dried at 150 ℃ potassium dichromate (reference reagent), dissolved in water moved
100mL volumetric flask, dilute with water to volume, and mix. 1.000mg per 1mL solution containing chromium oxide.
3.11 Chromium trioxide standard solution.
Dispensing 25.00mL chromium oxide standard stock solution (3.10) in 500mL volumetric flask and dilute to volume, and mix. This solution
50μg per 1mL solution containing chromium oxide.
4 Instrument
4.1 Atomic absorption spectrophotometer
With 0.5mm × 100mm single slit burner, chromium hollow cathode lamp. Under optimum working conditions, who meet the following indicators
Atomic absorption spectrophotometer can be used.
Low sensitivity. absorbance of the highest concentration standard arithmetical concentration of the standard solution is not less than 0.500 to absorbance scale expanded
Readings, its stability must also meet the following requirements.
Linear curve. arithmetic concentration standard solution standard solution absorbance readings of the difference between the two highest concentration shall be not less than the minimum concentration
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