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GB/T 8151.4-2012: Methods for chemical analysis of zinc concentrates -- Part 4: Determination of silicon dioxide content -- Molybdenum blue spectrophotometry
Status: Valid GB/T 8151.4: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8151.4-2012 | English | 139 |
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Methods for chemical analysis of zinc concentrates -- Part 4: Determination of silicon dioxide content -- Molybdenum blue spectrophotometry
| Valid |
GB/T 8151.4-2012
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| GB/T 8151.4-2000 | English | 199 |
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Methods for chemical analysis of zinc concentrates -Determination of silicon dioxide content
| Obsolete |
GB/T 8151.4-2000
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| GB/T 8151.4-1987 | English | RFQ |
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Methods for chemical analysis of zinc concentrates--The molybdenum blue spectrophotometric method for the determination of silica content
| Obsolete |
GB/T 8151.4-1987
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PDF similar to GB/T 8151.4-2012
Basic data | Standard ID | GB/T 8151.4-2012 (GB/T8151.4-2012) | | Description (Translated English) | Methods for chemical analysis of zinc concentrates -- Part 4: Determination of silicon dioxide content -- Molybdenum blue spectrophotometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.60 | | Word Count Estimation | 6,674 | | Older Standard (superseded by this standard) | GB/T 8151.4-2000 | | Regulation (derived from) | National Standards Bulletin No. 41 of 2012 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the amount of zinc concentrates Determination of silicon dioxide. This section applies to zinc concentrate silica content. Measuring range: 1. 00 % 15. 00%. | GB/T 8151.4-2012: Methods for chemical analysis of zinc concentrates -- Part 4: Determination of silicon dioxide content -- Molybdenum blue spectrophotometry
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Methods for chemical analysis of zinc concentrates Part 4. Determination of silicon dioxide content Molybdenum blue spectrophotometry
ICS 77.120.60
H13
National Standards of People's Republic of China
Replacing GB/T 8151.4-2000
Methods for chemical analysis of zinc concentrates
Part 4. Determination of the amount of silica
Molybdenum blue spectrophotometric method
Part 4. Determinationofsilicondioxidecontent-
Issued on. 2012-12-31
2013-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 8151 "Methods for chemical analysis of zinc concentrates" is divided into 20 parts.
--- Part 1. Determination of the amount of zinc Na2EDTA precipitation titration and extraction separation Na2EDTA titration;
--- Part 2. Determination of sulfur content - Combustion neutralization titration method;
--- Part 3. Determination of iron content Na2EDTA titration;
--- Part 4. Determination of silicon dioxide content - Molybdenum blue spectrophotometric method;
--- Part 5. Determination of lead content by flame atomic absorption spectrometry;
--- Part 6. Determination of copper content - Flame atomic absorption spectrometry;
--- Part 7. Determination of arsenic content by hydride generation - atomic fluorescence spectrometry and potassium bromate titration;
--- Part 8. Determination of cadmium content by flame atomic absorption spectrometry;
--- Part 9. Determination of the amount of fluorine ion selective electrode method;
--- Part 10. Determination of tin content by hydride generation - atomic fluorescence spectrometry;
--- Part 11. Determination of antimony content hydride generation - atomic fluorescence spectrometry;
--- Part 12. Determination of the amount of silver by flame atomic absorption spectrometry;
--- Part 13. Determination of the amount of germanium hydride generation - atomic fluorescence spectroscopy and spectrophotometry Phenylfuoron;
--- Part 14. Determination of nickel content by flame atomic absorption spectrometry;
--- Part 15. Determination of the amount of mercury atomic fluorescence spectrometry;
--- Part 16. Determination of cobalt content by flame atomic absorption spectrometry;
--- Part 17. Determination of the amount of zinc hydroxide precipitation -Na2EDTA titration;
--- Part 18. Determination of the amount of zinc ion exchange -Na2EDTA titration;
--- Part 19. Determination of the amount of gold and silver gray Chuihuo lead analysis or assay and flame atomic absorption spectrometry;
--- Part 20. Copper, lead, iron, arsenic, cadmium, antimony, calcium, magnesium content - Inductively coupled plasma atomic emission spectrometry.
This section GB/T 48151 Part of.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 8151.4-2000 "Methods for chemical analysis of zinc concentrates - Determination of silicon dioxide content." versus
GB/T 8151.4-2000 compared to the main changes are as follows.
--- Measuring range extended from 1.00% - from 10.00 to 1.00% - 15.00%;
--- Text format has been modified;
--- Added precision and test reports.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is responsible for drafting unit. MCC Huludao Nonferrous Metals Group Co., Ltd.
This section is drafted. Zhuzhou Smelter Group Co., Ltd.
Participated in the drafting of this section. Daye Nonferrous Metals Group Holdings Co., Ltd., Hunan Nonferrous Metal Research Institute, Hunan Chenzhou Jingui Bank
Co., Ltd., Beijing General Research Institute of Mining and Metallurgy, Tongling Nonferrous Metals Group Holdings Limited.
The main drafters of this section. Zhangyan Yun, Luo Gan, the De Lei, Liu Yan, Hujun Kai, Zou Zhi, Pangwen Lin, Liao Xiaohui, paragraph heroes, Gao Ying sword,
Wang Jinping, Zhang Wanxing.
This part of the standard replaces the previous editions are.
--- GB/T 8151.4-1987, GB/T 8151.4-2000.
Methods for chemical analysis of zinc concentrates
Part 4. Determination of the amount of silica
Molybdenum blue spectrophotometric method
1 Scope
This section GB/T 8151 provisions for the determination of silicon dioxide content of zinc concentrates.
This section applies to the determination of silicon dioxide content of zinc concentrates. Measuring range. 1.00% to 15.00%.
2 Method summary
Sample decomposition with sodium hydroxide melt in sulfuric acid medium with ammonium molybdate generation silicon silicon molybdenum heteropoly acid, ascorbic acid reducing silicon molybdenum heteropoly
Acid molybdenum blue. Spectrophotometer measured absorbance at 650nm wavelength.
3 Reagents
Unless otherwise indicated in the analysis using only recognized as analytical reagent and double distilled water. Glassware are used in the experiments with dilute nitric acid
After soaking, thoroughly washed with distilled water twice.
3.1 sodium hydroxide, pure class distinctions.
3.2 sulfate (11).
3.3 sulfate (19).
3.4 Aqueous ammonia (11).
3.5 ammonium molybdate solution (80g/L), filtered to use.
3.6 ascorbic acid solution (20g/L), the day of preparation.
3.7 pairs nitrophenol solution (1g/L).
3.8 dope also. ascorbic acid (3.6) and sulfuric acid (3.2) by mixing ratio 1.2, the time is now equipped with.
3.9 silica standard stock solution. Weigh 0.5000g superior grade pure silica (previously calcined at 950 ℃ 30min, placed in the dryer
Cooled to room temperature) in the mixed flux containing 5g (duplicate copy of anhydrous sodium carbonate and potassium carbonate mix) platinum crucible, mix, then cover 2g
Mixed flux and placed 900 ℃ ~ 950 ℃ high temperature furnace melting 1h, coolish, the crucible external water purged after a clean place 300mL polytetrafluoroethylene
Fluoride beaker, add 150mL of hot water extraction, wash the crucible, cooled, diluted with water to a 500 mL, the solution containing 1mg 1ml dioxide
silicon. Store in plastic bottle.
3.10 Silica Standard Solution. Pipette silica 50.00mL standard stock solution (3.9) in 500mL volumetric flask, diluted with water
To the mark, and mix. This solution 1mL containing 100μg silica. Store in plastic bottle.
4 Instrument
Spectrophotometer.
5 Sample
5.1 Samples should sift through the 0.100mm hole.
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