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GB/T 14352.1-2010 English PDF

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GB/T 14352.1-2010: Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 1: Determination of tungsten content
Status: Valid

GB/T 14352.1: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 14352.1-2010English189 Add to Cart 3 days [Need to translate] Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 1: Determination of tungsten content Valid GB/T 14352.1-2010
GB/T 14352.1-1993English199 Add to Cart 2 days [Need to translate] Methods for chemical analysis of tungsten ores and molybdenum ores Obsolete GB/T 14352.1-1993

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SN/T 2763.6   GB/T 14353.18   SN/T 3365   GB/T 14352.3   GB/T 14352.4   GB/T 14352.2   

Basic data

Standard ID GB/T 14352.1-2010 (GB/T14352.1-2010)
Description (Translated English) Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 1: Determination of tungsten content
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard D40
Classification of International Standard 73.060
Word Count Estimation 8,885
Date of Issue 2010-11-10
Date of Implementation 2011-02-01
Older Standard (superseded by this standard) GB/T 14352.1-1993
Quoted Standard GB/T 6682; GB/T 14505; GB/T 14352.2
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 the amount of tungsten molybdenum ore. This section applies to tungsten ores, determination of the amount of wood tungsten ore.

GB/T 14352.1-2010: Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 1: Determination of tungsten content


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Methods for chemical analysis of tungsten ores and molybdenum ores Part 1. Determination of tungsten content ICS 73.060 D40 National Standards of People's Republic of China Replacing GB/T 14352.1-1993 Tungsten ores and molybdenum ores - Methods for chemical analysis Part 1. Determination of the amount of tungsten Part 1. Determinationoftungstencontent 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 1. This Part replaces GB/T 14352.1-1993 "tungsten ores and molybdenum ores - Methods for chemical analysis thiocyanate spectrophotometric determination of tungsten content." Section compared with the GB/T 14352.1-1993, major changes in the following. --- Increasing the content of the warning; --- 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 14352.1-1993. Tungsten ores and molybdenum ores - Methods for chemical analysis Part 1. Determination of the amount of tungsten 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 specifies the method for the determination of tungsten content of tungsten ores and molybdenum ores. This Part applies to tungsten ores and determination of tungsten content of molybdenum ore. Measurement range. from 0.05% to 5% of tungsten trioxide.

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 GB/T 14352.2 tungsten ores and molybdenum ores - Methods for chemical analysis - Part 2. Determination of molybdenum content Principle 3 Sample molten sodium peroxide, hot water extraction, iron, titanium, manganese, nickel, cobalt, niobium, tantalum and tungsten to form a precipitate separated. An aliquot of the filtrate In hydrochloric acid medium, titanium trichloride tungsten reducing pentavalent state thiocyanate forms a yellow complex on the spectrophotometer, at a wavelength Absorbance was measured at 420nm, calculate the amount of tungsten. Molybdenum can also be reduced to titanium trichloride is pentavalent and thiocyanate generated orange-red complexes affect the determination. If the concentration of hydrochloric acid is greater than 25%, When adding an excess of the reducing agent can restore the trivalent molybdenum with thiocyanate complexes formed yellow, the color intensity much lower than tungsten thiocyanate yellow Complex is weak, 0.2mg of molybdenum (50 mL chromogenic volume) had no effect on the determination, when exceeding this amount shall be calibrated, or decomposed with an acid Sample of separation.

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 ethanol. 4.3 formaldehyde. 4.4 hydrochloride (ρ1.19g/mL). 4.5 solution of potassium thiocyanate (250g/L, the time is now equipped with). 4.6 sodium hypophosphite solution (100g/L). Solution of aluminum chloride 4.7 [500g/L, with the preparation of aluminum chloride hexahydrate (AlCl3 · 6H2O)]. 4.8 titanium trichloride solution (15g/L). Pipette 10mL titanium trichloride solution (150g/L), placed in 100mL flask, diluted with hydrochloric acid (4.4) to the mark with a time of

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