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GB/T 14352.9-2010: Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 9: Determination of sulfur content
Status: Valid GB/T 14352.9: Evolution and historical versions
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| GB/T 14352.9-2010 | English | 139 |
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Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 9: Determination of sulfur content
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GB/T 14352.9-2010
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| GB/T 14352.9-1993 | English | 199 |
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Methods for chemical analysis of tungsten ores and molybdenum ores. Determination of totol sulfur content. Iodometric method after combustion
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GB/T 14352.9-1993
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PDF similar to GB/T 14352.9-2010
Basic data | Standard ID | GB/T 14352.9-2010 (GB/T14352.9-2010) | | Description (Translated English) | Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 9: Determination of sulfur content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D40 | | Classification of International Standard | 73.060 | | Word Count Estimation | 6,616 | | Date of Issue | 2010-11-10 | | Date of Implementation | 2011-02-01 | | Older Standard (superseded by this standard) | GB/T 14352.9-1993 | | Quoted Standard | GB/T 6682; GB/T 14505 | | Regulation (derived from) | National Standard Approval Announcement 2010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 ore sulfur content. This section applies to tungsten ores, determination of molybdenum ore sulfur content. Measuring range: 0. 05 to 10% sulfur. | GB/T 14352.9-2010: Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 9: Determination of sulfur content
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Methods for chemical analysis of tungsten ores and molybdenum ores Part 9. Determination of sulfur content
ICS 73.060
D40
National Standards of People's Republic of China
Replacing GB/T 14352.9-1993
Tungsten ores and molybdenum ores - Methods for chemical analysis
Part 9. Determination of the amount of sulfur
Part 9. Determinationofsulfurcontent
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 Part of 914,352.
This Part replaces GB /"the determination of total sulfur content of tungsten ores and molybdenum ores chemical analysis of high temperature combustion iodometric method" T 14352.9-1993.
Section compared with the GB/T 14352.9-1993, major changes in the following.
--- Increasing the content of the warning;
--- Modify the sample drying temperature;
--- Modify the sample questionnaire.
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. new Zhang, Xiao Ling.
This part of the standard replaces the previous editions are.
--- GB/T 14352.9-1993.
Tungsten ores and molybdenum ores - Methods for chemical analysis
Part 9. Determination of the amount of sulfur
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 molybdenum ores in the determination of sulfur content.
This Part applies to tungsten ores and determination of sulfur content of molybdenum ore.
Measurement range. from 0.05% to 10% sulfur.
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 in the presence of a flux, in a stream of air at 1200 ℃ ~ 1300 ℃ high temperature combustion, sulfur dioxide release form for air
Flow into the carrier tape filled with water absorber starch as indicator, titrate with potassium iodate standard solution produced by the reaction of sulfurous acid, calculated the amount of sulfur.
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 copper oxide (of CuO) [linear, or lead oxide (of PbO), a sulfur-containing volume is less than 0.00 ×%].
4.2 silica (particle diameter 0.125mm, burning at 1000 ℃ 2h, there should be no blank).
4.3 starch absorption liquid hydrochloric acid.
Weigh 0.4g soluble starch, add water into a paste, add 100mL freshly boiled water and continue to boil 1min The solution was transparent, cold
But add water to about 800mL, 3mL hydrochloric acid was added (ρ1.19g/mL), diluted with water to 1000mL, shake.
4.4 potassium iodate standard solution preparation and calibration.
a) potassium iodate standard solution c (1/6KIO3) = 0.015mol/L. Weigh 0.5350g potassium iodate, placed in 1000mL beaker,
Potassium hydroxide containing 1g, 5g of potassium iodide dissolved in water 400mL, diluted with water to 1000mL, shake;
b) potassium iodate standard solution c (1/6KIO3) = 0.005mol/L. Weigh 0.1783g potassium iodate, placed in 1000mL beaker,
Potassium hydroxide containing 1g, 5g of potassium iodide dissolved in water 400mL, diluted with water to 1000mL, shake;
c) potassium iodate standard solution c (1/6KIO3) = 0.001mol/L. Pipette 200mL potassium iodate standard solution [4.4b)], into
1000mL volumetric flask containing 0.8g of potassium hydroxide, an aqueous solution of 400mL 4g of potassium iodide, diluted with water to the mark with
Degree, shake;
d) Calibration. Weigh and analyze the composition of the sample and roughly the same amount of sulfur standard sample in triplicate, according to the analysis step (7) for calibration.
Poor value triplicate samples of potassium iodate standard solution consumed no more than 0.20mL, can be averaged. And at the same time
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