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GB/T 14506.25-2010: Methods for chemical analysis of silicate rocks -- Part 25: Determination of molybdenum and tungsten content
Status: Valid GB/T 14506.25: Evolution and historical versions
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| GB/T 14506.25-2010 | English | 169 |
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Methods for chemical analysis of silicate rocks -- Part 25: Determination of molybdenum and tungsten content
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GB/T 14506.25-2010
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| GB/T 14506.25-1993 | English | 199 |
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Silicate rocks. Determination of molybdenum and tungsten content. Sulfuric acid-phenylhydroxyacetic acid-cinchonine-potassium chlorate medium polarographic method
| Obsolete |
GB/T 14506.25-1993
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Basic data | Standard ID | GB/T 14506.25-2010 (GB/T14506.25-2010) | | Description (Translated English) | Methods for chemical analysis of silicate rocks -- Part 25: Determination of molybdenum and tungsten content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D53 | | Classification of International Standard | 73.080 | | Word Count Estimation | 7,715 | | Date of Issue | 2010-11-10 | | Date of Implementation | 2011-02-01 | | Older Standard (superseded by this standard) | GB/T 14506.25-1993 | | Quoted Standard | GB/T 6682; GB/T 14506.1 | | Regulation (derived from) | National Standard Approval Announcement 2010 No.8 (Total No.163) | | 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 method for the determination of molybdenum and tungsten content of silicate rocks. This section applies to the determination of molybdenum and tungsten content of silicate rocks. This section also applies to the determination of molybdenum and tungsten content of soils and stream sediments. Measuring range: 0. 25��g/g ~ 10��g/g of molybdenum, 0. 50��g/g ~ 20��g/g of tungsten content. | GB/T 14506.25-2010: Methods for chemical analysis of silicate rocks -- Part 25: Determination of molybdenum and tungsten content
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Methods for chemical analysis of silicate rocks Part 25. Determination of molybdenum and tungsten content
ICS 73.080
D53
National Standards of People's Republic of China
Replacing GB/T 14506.25-1993
Silicate rocks -
Part 25. Determination of the amount of molybdenum and tungsten
Part 25. Determinationofmolybdenumandtungstencontent
Issued on. 2010-11-10
2011-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 14506 "Methods for chemical analysis of silicate rocks" 30 consists of the following components.
--- Part 1. Determination of water absorption;
--- Part 2. Determination of combined water;
--- Part 3. Determination of the amount of silica;
--- Part 4. Determination of the amount of aluminum oxide;
--- Part 5. Determination of total iron content;
--- Part 6. Determination of calcium oxide content;
--- Part 7. Determination of the amount of magnesium oxide;
--- Part 8. Determination of the amount of titanium dioxide;
--- Part 9. Determination of the amount of phosphorus pentoxide;
--- Part 10. Determination of the amount of manganese oxide;
--- Part 11. Determination of the amount of sodium hydroxide and oxide;
--- Part 12. Determination of the amount of fluorine;
--- Part 13. Determination of sulfur content;
--- Part 14. Determination of ferrous oxide;
--- Part 15. Determination of the amount of lithium;
--- Part 16. Determination of the amount of rubidium;
--- Part 17. Determination of the amount of strontium;
--- Part 18. Determination of copper content;
--- Part 19. Determination of lead content;
--- Part 20. Determination of the amount of zinc;
--- Part 21. Determination of the amount of nickel and cobalt;
--- Part 22. Determination of the amount of vanadium;
--- Part 23. Determination of chromium;
--- Part 24. Determination of cadmium content;
--- Part 25. Determination of molybdenum and tungsten;
--- Part 26. Determination of cobalt content;
--- Part 27. Determination of nickel content;
--- Part 28. Determination of the amount of 16 major and minor components;
Part --- 29. 22 the amount of rare earth element determination;
--- Part 30. Determination of the amount of 44 elements.
This section GB/T 14506 of Part 25.
This Part replaces GB/T 14506.25-1993 "Silicate rocks - sulfuric acid - phenyl acetic acid - cinchonine potassium chlorate
Continuous determination of molybdenum and tungsten content "was polarography.
Section compared with the GB/T 14506.25-1993 main change this as follows.
--- Increasing the normative references;
--- Increased warning, warning.
This section presents the People's Republic of China Ministry of Land Resources.
This part of the National Standardization Technical Committee under the jurisdiction of Land and Resources.
This section drafted by. National Geological Experimental Test Center.
The main drafters of this section. Wangsu Ming, Yan Maohong.
This part of the standard replaces the previous editions are.
--- GB/T 14506.25-1993.
Silicate rocks -
Part 25. Determination of the amount of molybdenum and tungsten
Warning --- Use this section shall be a person experiences regular laboratory work. This section does not point out all possible security asked
question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
GB/T 14506 provisions of this part of the molybdenum and tungsten determination of the amount of silicate rock.
This section applies to the determination of silicate rocks molybdenum and tungsten content, and also applicable to the determination of molybdenum and tungsten content of soils and stream sediments.
Measuring range. 0.25μg/g ~ 10μg/g of molybdenum, 0.50μg/g ~ 20μg/g of tungsten content.
2 Normative references
The following documents contain provisions which, through reference GB/T 14506 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
Laboratory use specifications and test methods GB/T 6682 Analysis
GB/T 14506.1 Silicate rocks - Part 1. Determination of water adsorption
Principle 3
Sample molten sodium peroxide, sulfuric acid - phenyl acetic acid - cinchonine -2.4% potassium chlorate, the molybdenum and tungsten can produce sensitive polarographic
Catalytic wave on the oscilloscope Polarograph, peak potential is -0.28V and -0.76V (saturated calomel electrode), and a regular part of the derivative section respectively
Determination of molybdenum and tungsten, molybdenum and tungsten peak height and concentration is linear, calculate the amount of molybdenum and tungsten.
4 Reagents
Unless otherwise stated in this section are consistent with the use of analytical reagent and GB/T 6682 analytical laboratory use in the analysis.
4.1 sodium peroxide.
4.2 sodium (potassium).
4.3 ethanol.
4.4 sulfuric acid (11), pure class distinctions. Warning --- improper dilution risk prone
4.5 phenylhydroxyacetic acid solution (100g/L).
4.6 cinchonine solution (4g/L). Weigh 0.4g cinchonine, placed in 150mL beaker, add 20mL water, a solution of sulfuric acid (4.4) Number
Solubilization drops, water moved 100mL flask and dilute to volume, shake.
4.7 potassium chlorate solution (60g/L).
4.8 Molybdenum standard solution.
a) Molybdenum standard solution (100.0μg/mL).
Weigh 0.1500g previously burned through 500 ℃ 1h and was the dryer to cool high-purity molybdenum trichloride, placed burning 150mL
Cup, 10mL was added sodium hydroxide solution (100g/L), dissolved using sulfuric acid (4.4) and neutralize excess 1mL, transferred to 1000mL
Volumetric flask, dilute to the mark, shake, solution 1mL 100.0μg containing molybdenum;
b) Molybdenum standard solution (10.0μg/mL).
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