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GB/T 14352.2-2010: Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 2: Determination of molybdenum content
Status: Valid GB/T 14352.2: Evolution and historical versions
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| GB/T 14352.2-2010 | English | 139 |
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Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 2: Determination of molybdenum content
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GB/T 14352.2-2010
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| GB/T 14352.2-1993 | English | 199 |
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Methods for chemical analysis of tungsten ores and molybdenum ores. Determination of molybdenum content. potassium thiocynate photometric method
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GB/T 14352.2-1993
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Basic data | Standard ID | GB/T 14352.2-2010 (GB/T14352.2-2010) | | Description (Translated English) | Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 2: Determination of molybdenum content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D40 | | Classification of International Standard | 73.060 | | Word Count Estimation | 6,634 | | Date of Issue | 2010-11-10 | | Date of Implementation | 2011-02-01 | | Older Standard (superseded by this standard) | GB/T 14352.2-1993 | | Quoted Standard | GB/T 6682; GB/T 14505 | | Regulation (derived from) | National Standard Approval Announcement 2010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 tungsten ores, determination of molybdenum in molybdenum ores. This section applies to tungsten ores, determination of molybdenum content of molybdenum ore. Measuring range: 0. 01% to 5% molybdenum. | GB/T 14352.2-2010: Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 2: Determination of molybdenum content
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Methods for chemical analysis of tungsten ores and molybdenum ores Part 2. Determination of molybdenum content
ICS 73.060
D40
National Standards of People's Republic of China
Replacing GB/T 14352.2-1993
Tungsten ores and molybdenum ores - Methods for chemical analysis
Part 2. Determination of molybdenum content
Part 2. Determinationofmolybdenumcontent
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 14352 "tungsten ores and molybdenum ores chemical analysis methods," a total of 18 parts.
--- Part 1. Determination of tungsten;
--- Part 2. Determination of molybdenum;
--- Part 3. Determination of copper content;
--- Part 4. Determination of lead content;
--- Part 5. Determination of the amount of zinc;
--- Part 6. Determination of cadmium content;
--- Part 7. Determination of cobalt content;
--- Part 8. Determination of nickel content;
--- Part 9. Determination of sulfur content;
--- Part 10. Determination of arsenic content;
--- Part 11. Determination of the amount of bismuth;
--- Part 12. determination of silver;
--- Part 13. Determination of tin;
--- Part 14. Determination of gallium;
--- Part 15. Determination of germanium content;
--- Part 16. Determination of the amount of selenium;
--- Part 17. Determination of tellurium content;
--- Part 18. Determination of the amount of rhenium.
This section GB/T 14352 Part 2.
This Part replaces GB/T 14352.2-1993 "tungsten ores and molybdenum ores - Methods for chemical analysis thiocyanate spectrophotometric determination of molybdenum content."
Section compared with the GB/T 14352.2-1993, major changes in the following.
--- Increased alert, warnings;
--- Modify the sample drying temperature.
Appendix A of this section is an informative annex.
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 is responsible for drafting. National geology test center.
This section is drafted. Jiangsu Provincial Institute of Geological Survey (Ministry of Land and Mineral Resources Supervision and Testing Center, Nanjing).
The main drafters of this section. CAI Yu Man, Zhang new.
This part of the standard replaces the previous editions are.
--- GB/T 14352.2-1993.
Tungsten ores and molybdenum ores - Methods for chemical analysis
Part 2. Determination of molybdenum content
Warning. Use of this section a person shall be regular laboratory work experience. This section does not indicate that all possible security issues.
Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
This section GB/T 14352 provides for tungsten ores and determination of molybdenum content of molybdenum ore.
This Part applies to tungsten ores and determination of molybdenum content of molybdenum ore.
Measurement range. from 0.01% to 5% molybdenum.
2 Normative references
The following documents contain provisions which, through reference GB/T 14352 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 14505 method for chemical analysis of rocks and ores General rules and regulations
Principle 3
Sample molten sodium peroxide, the flooding, and the filtrate in sulfuric acid medium with copper catalysis, thiourea molybdenum reduction pentavalent state, and thiocyanate
Combined into a soluble salt molybdenum complex thiocyanate orange, on a spectrophotometer, the absorbance is measured at a wavelength of 460nm, and calculate the amount of molybdenum.
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 sulfuric acid - copper sulfate solution.
Weigh 4g of copper sulfate (CuSO4 · 5H2O), was added 500mL of water, stirred and dissolved, sulfuric acid was added 500mL (ρ1.84g/mL),
Stir, cooled diluted with water to 1000mL, shake.
4.3 sodium citrate solution (300g/L).
4.4 thiourea solution (90g/L).
4.5 solution of potassium thiocyanate (250g/L).
4.6 Molybdenum standard solution [ρ (Mo) = 100.0μg/mL].
0.1500g weighed molybdenum trioxide (99.99%) (previously calcined at 500 ℃ over), placed in 100mL beaker, add 5mL hydroxide
Sodium solution (200g/L) was dissolved, then add sulfuric acid solution (11) (Caution. improper dilution prone risk) and to slightly acidic, and had
The amount of 20mL, transferred to 1000mL volumetric flask, dilute to the mark, shake.
5 Instruments
5.1 Analytical balance. three, a sense of the amount of 0.1mg.
5.2 Spectrophotometer.
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