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GB/T 15249.1-2009: Methods for chemical analysis of crude gold -- Part 1: Determination of gold content -- Fire assay gravimetric method
Status: Valid GB/T 15249.1: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 15249.1-2009 | English | 169 |
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Methods for chemical analysis of crude gold -- Part 1: Determination of gold content -- Fire assay gravimetric method
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GB/T 15249.1-2009
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| GB/T 15249.1-1994 | English | 199 |
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Crude Gold-Determination of gold content-Fire assay gravimetric method
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GB/T 15249.1-1994
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PDF similar to GB/T 15249.1-2009
Basic data | Standard ID | GB/T 15249.1-2009 (GB/T15249.1-2009) | | Description (Translated English) | Methods for chemical analysis of crude gold -- Part 1: Determination of gold content -- Fire assay gravimetric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H15 | | Classification of International Standard | 77.120.70 | | Word Count Estimation | 7,742 | | Date of Issue | 2009-05-06 | | Date of Implementation | 2009-10-01 | | Older Standard (superseded by this standard) | GB/T 15249.1-1994 | | Quoted Standard | GB/T 17373 | | Regulation (derived from) | National Standard Approval Announcement 2009 No.6 (Total No.146) | | 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 measuring crude gold gold content. This section applies to crude gold (mine gold, metallurgical recovery of coarse gold products and gold) Determination of the amount of gold. Determination of gold content range: 30. 00% to 99. 90 %. When the sample contains affect the measurement accuracy of the fire assay gravimetric method of interfering elements (such as iridium, palladium, platinum, rhodium, ruthenium and osmium, etc.), this section will not apply. | GB/T 15249.1-2009: Methods for chemical analysis of crude gold -- Part 1: Determination of gold content -- Fire assay gravimetric method
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Methods for chemical analysis of crude gold Part 1. Determination of gold content Fire assay gravimetric method
ICS 77.120.70
H15
National Standards of People's Republic of China
Replacing GB/T 15249.1-1994
Crude Gold Analysis
Part 1. Determination of gold content
Fire assay gravimetric method
Posted 2009-05-06
2009-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 15249 "Crude Gold analysis method" is divided into the following five sections.
--- Part 1. Determination of the amount of gold fire assay gravimetric method;
--- Part 2. Determination of the amount of silver fire assay gravimetric and EDTA titration;
--- Part 3. Determination of copper content iodometry;
--- Part 4. Determination of lead content EDTA titration;
--- Part 5. Determination of mercury content - Cold atomic absorption spectrometry.
This section GB/T 15249 Part 1.
This Part replaces GB/T 15249.1-1994 "the determination of gold Crude Gold analysis fire assay gravimetric method."
This portion of the GB/T 15249.1-1994 compared to the main changes are as follows.
--- "1" and the increase of interfering elements "When a sample containing affecting the measurement accuracy of fire assay gravimetric method (such as iridium, palladium, platinum,
Rhodium, ruthenium and osmium), this section does not apply "limited content;
--- The old version 5.6 Reagents and material terms "gold standard. the gold content of 99.95% to 99.99% of the electrolytic refining of pure flake
Gold "to" gold standard. the gold content of not less than 99.98% "; the old version 7.1.5 clause analysis step" drying
After a high temperature furnace at 800 ℃ burning 5min "changed to" burning after drying in a box high temperature furnace (5.1) at 800 ℃ within
3min "; remove the old version 7.2.2 clause analysis step," the average of the four standard sample measurement results as measured by the standard
Gold volume sample quality "; the old version 7.3.1.1 articles analyzing step" around the ash pan in preheated 950 ℃ temperature furnace
20min, and then the material to be tested (7.2.1) with the standard sample (7.2.2) in a reasonable order placed in the cupel "changed to" the ash pan
Gradually warmed to about 950 ℃ into the box-type high-temperature furnace (5.1) preheat 20min, and then the material to be tested (7.2.1) with the standard
Sample (7.2.2) in order cross into the gray dish "; the old version 7.3.4 clause analysis step," and then in a high temperature furnace in
800 ℃ burning 5min "Change" and then in a box high temperature furnace (5.1) at 800 ℃ burning within 3min ";
--- Text format has been modified; adds, "Preface", as described in GB/T 15249 "Methods for chemical analysis of crude gold" composition
Partial revision of the standard and background information;
--- Remove the old version of "term" clause on the "principle of the method" clause text was re-expressed;
--- The old version of "reference standard" clause changed to "Normative references" clause, adding clause "samples";
--- In the "results of the analysis to calculate the" Terms restatement is calculated and the result unit and adds the results to the decimal representation
After the contents of the median point;
--- Remove the old version of "allowable difference" clause;
--- Added "precision" clause, "quality assurance and control" clause;
--- Remove the old version of Appendix A.
This section proposed by the People's Bank of China.
This part of the National Standardization Technical Committee on Finance (SAC/TC180) centralized.
This section is responsible for drafting the Chengdu Banknote Printing Company.
This section Changchun Gold Research Institute, Shenyang Mint, Beijing Mining Research Institute, Shanghai Mint, Mint and Nanjing Zijin Mining Set
Ltd. participated in the drafting group.
The main drafters of this section. Chen Jie, Wang Zisen, Xing Guizhen Xu Cunsheng, Yaoji Yang, Huang Rui, Chen Feifei, Laimao Ming, Wang Yu, Mu Hua,
Bo, pearl summer, Su Jing.
This part of the standard replaces the previous editions are.
--- GB/T 15249.1-1994.
Crude Gold Analysis
Part 1. Determination of gold content
Fire assay gravimetric method
1 Scope
This section GB/T 15249 specifies the Crude Gold - Determination of gold content.
This section applies to the determination of crude gold (gold mining, smelting and recycling crude metal products such as gold) gold content. Determination of gold content range.
30.00% to 99.90%.
When a sample containing the influence of interference element fire assay gravimetric method for the measurement accuracy (such as iridium, palladium, platinum, rhodium, ruthenium and osmium), this section will not
Be applicable.
2 Normative references
The following documents contain provisions which, through reference GB/T 15249 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.
GB/T 17373 Crude Gold Sampling Method
3 PRINCIPLE OF THE METHOD
Weigh a certain amount of crude gold sample and quantitatively appropriate amount of silver, wrapped in lead foil performed at a high temperature molten ash blown state, lead and base metals
The case is isolated and oxidized silver and gold, the gold and silver alloy particles made of an alloy by volume nitric acid points after weighing gold, along with the determination of the gold standard after correction
Calculate the mass fraction of gold in a sample.
4 Reagents and materials
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.
4.1 lead foil. pure lead (mass fraction of not less than 99.99%) processed into a length of about 51mm, a thickness of about 0.1mm square sheet.
4.2 Silver. Silver content of not less than 99.99%.
4.3 Standard gold. gold content of not less than 99.98%.
Nitrate 4.4 (ρ1.42g/mL).
4.5 nitric acid (1 + 1).
4.6 nitric acid (1 + 2).
5 instruments and appliances
5.1 box-type high-temperature furnace.
5.2 Balance. a sense of the amount of 0.01mg.
5.3 mill machine. small, rolled up to a thickness of 0.1mm.
5.4 cupel
5.4.1 ashes dish. animal ashes made from the ashes of the best sheep. The ashes of burned animal bones crushed after size 0.175mm below
Ashes powder, add 10% to 15% of the water pressing on the gray ash pan dish machine, natural drying after use. Ashes dish Dimensions. Diameter 30mm, height
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