GB/T 3884.14-2012Methods for chemical analysis of copper concentrates -- Part 14: Determination of gold and silver -- Fire assay gravimetric and flame atomic absorption spectrometric method (English PDF)

Foreword

GB/T 3884 "chemical analysis of copper concentrate" is divided into 14 parts.

--- Part 1. Determination of copper content iodometry;

--- Part 2. Determination of the amount of gold and silver by flame atomic absorption spectroscopy and fire assay;

--- Part 3. Determination of sulfur content - Gravimetric and combustion - titration;

--- Part 4. Determination of magnesium oxide content - Flame atomic absorption spectrometry;

--- Part 5. Determination of the amount of fluorine ion selective electrode method;

--- Part 6. Determination by flame atomic lead, zinc, cadmium and nickel absorption spectrometry;

--- Part 7. Determination of lead content Na2EDTA titration;

--- Part 8. Determination of zinc contents Na2EDTA titration;

--- Part 9. Determination of the amount of arsenic and bismuth hydride generation - atomic fluorescence spectrometry, potassium bromate titration and diethyl ammonia Silver group acid spectrophotometry;

--- Part 10. Determination of antimony content hydride generation - atomic fluorescence spectrometry;

--- Part 11. Determination of mercury content - Cold atomic absorption spectrometry;

--- Part 12. Determination of the amount of fluorine and chlorine ion chromatography;

--- Part 13. Determination of the amount of copper electrolysis;

--- Part 14. Determination of the amount of gold and silver fire assay gravimetric method and atomic absorption spectrometry.

This is Part 14 GB/T 3884's.

Rules in this section in accordance with GB/T 1.1-2009 given draft.

2005 "in the copper sulphide concentrate Determination of gold and silver fire assay and atomic absorption. the use of ISO 10378 in this section use the translation method equivalent Spectroscopy. " this part of ISO 10378:2006 main differences are as follows.

--- English name made the change;

--- With a decimal point instead of a comma as the decimal point in the international standard ",". ",";

--- With a period instead of a full stop in the international standard. "". "";

--- With "this Part" instead of "this International Standard";

--- According to Chinese customary change the standard name;

--- Remove the cover of the international standards, directory, foreword and introduction.

The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.

This section is responsible for drafting unit. Daye Nonferrous Metals Group Holdings Co., Ltd., China Nonferrous Metals Industry Institute of Standards Metrology and Quality.

Participated in the drafting of this section. Hunan Nonferrous Metal Research Institute.

1 Scope

This section GB/T 3884 provisions of the sulfide copper concentrate gold, silver content determination --- fire assay gravimetric and flame atomic absorption Close spectrometry.

This section applies to the determination of copper content of 15% to 60% of the copper sulphide concentrate gold and silver content of the determination of the range of Au0.5g/t ~ 300.0g/t, Ag25g/t ~ 1500g/t.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 27674-2011 copper sulfide, determination of lead and zinc concentrate sample hygroscopic moisture weight method (ISO 9599:1991, IDT) ISO 385.1. 1984 Laboratory glassware Burettes - Part 1. General requirements (Laboratoryglassware-Burettes-Part 1. Generalrequirements) ISO 648. 1977 Laboratory glassware single pipette (Laboratoryglassware-One-markpipettes) ISO 1042:1998 scale laboratory glassware single flask (Laboratoryglassware-One-markvolumetric flasks) ISO 3696. 1987 laboratory analysis of water specifications and test methods (1987, Waterforanalyticallaboratoryuse-Specificationandtestmethods) ISO 4787. 1984 laboratory glassware containers capacity use and capacity correction method (Laboratoryglassware-Volumetricglassware-Methodsforuseandtestingofcapacity)

3 Method summary

Fire assay gravimetric method for the determination of gold and silver by 3.1 to 3.5 were firstly isolated from other associated metals, precious metals, and from the enrichment to Precious metals combined grain isolated gold.