GB/T 3884.7: Evolution and historical versions
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| GB/T 3884.7-2025 | English | RFQ |
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Methods for chemical analysis of copper concentrates - Part 7: Determination of lead and zinc contents - Na2EDTA titration method
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GB/T 3884.7-2025
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| GB/T 3884.7-2012 | English | 139 |
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Methods for chemical analysis of copper concentrates -- Part 7: Determination of lead content -- Na2EDTA titration method
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GB/T 3884.7-2012
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| GB/T 3884.7-2000 | English | 199 |
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Methods for chemical analysis of copper concentrates Determination of lead content
| Obsolete |
GB/T 3884.7-2000
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| GB/T 3884.7-1983 | English | RFQ |
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Methods for chemical analysis of copper concentrates--The flame atomic absorption spectrophotometric method for the determination of lead content
| Obsolete |
GB/T 3884.7-1983
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Basic data | Standard ID | GB/T 3884.7-2025 (GB/T3884.7-2025) | | Description (Translated English) | Methods for chemical analysis of copper concentrates - Part 7: Determination of lead and zinc contents - Na2EDTA titration method | | Sector / Industry | National Standard (Recommended) | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 3884.7-2012, GB/T 3884.8-2012 | GB/T 3884.7-2012: Methods for chemical analysis of copper concentrates -- Part 7: Determination of lead content -- Na2EDTA titration method
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS77.120.60
H13
National Standards of People's Republic of China
Replacing GB/T 3884.7-2000
Methods for chemical analysis of copper concentrates
Part 7. Determination of lead content
Na2EDTA titration
Part 7. Determinationofleadcontent-
Issued on. 2013-10-01 2012-12-31 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
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 7.
This section is in accordance with GB/T 1.1-2009 given rules drafted.
This Part replaces GB/T 3884.7-2000 "Methods for chemical analysis of copper concentrates Determination of lead content", and GB/T 3884.7-2000 phase
Ratio, mainly the following changes.
--- Text format has been modified;
--- Supplementary terms of precision and test reports.
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 Limited.
This section is drafted. Tongling Nonferrous Metals Group Holdings Limited.
Participated in the drafting of this section. In the mountains of Nonferrous Metals Group Co., Ltd., Beijing General Research Institute of Mining and Metallurgy, Jiangxi Copper Company Limited,
Yanggu Yoshimitsu Copper Co., Ltd., Kunming Institute of Metallurgy, Hunan Chenzhou City Jingui Silver Industry Co., Ltd., shares of Zijin Mining Group Co.,
The company, Yunnan Copper Co., Ltd., Hunan Nonferrous Metals Group Co., Ltd. Shuikoushan.
The main drafters of this section. Shao from and, Liqin Mei, Xiao-Yan Chen, Cheng Haoyu, Zhouxiao Kai, Zhang Guanghua, Liu Chunfeng, Tangshu Fang, Kay,
Zhang, the Zhaode Ping, Liao Xiaohui, Liu Chunhua, Zeng Guangming, Shen Guang Xin, Liu Junxia, \u200b\u200bGong Chang together, FAN Li exchange, segment heroes, Huangju Mei.
This part of the standard replaces the previous editions are.
--- GB/T 3884.8-1983, GB/T 3884.7-2000.
Methods for chemical analysis of copper concentrates
Part 7. Determination of lead content
Na2EDTA titration
1 Scope
This section GB/T 3884 provides for determination of lead content in copper concentrates.
This section applies to the determination of lead content in copper concentrates measurement range.. Pb > 5.00% ~ 13.00%.
2 Method summary
Sample with nitric acid, sulfuric acid dissolution, lead to lead sulfate precipitate separated from other interfering elements, the precipitate was dissolved in acetic acid - sodium acetate buffer solution
The xylenol orange as indicator, titrate with Na2EDTA standard titration solution, measured the amount of lead.
3 Reagents
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.
3.1 ascorbic acid.
3.2 ethanol.
3.3 hydrochloric acid (ρ = 1.19g/mL).
3.4 hydrochloride (11).
3.5 perchloric acid (ρ = 1.67g/mL).
3.6 Hydrofluoric acid (ρ = 1.15g/mL).
3.7 nitric acid (ρ = 1.42g/mL).
3.8 nitric acid (11).
3.9 nitric acid (14).
3.10 sulfate (ρ = 1.84g/mL).
Sulfuric acid 3.11 (124).
3.12 sulfuric acid (149).
3.13 sulfur nitrate mixed acid. stirring and cooling, a solution of sulfuric acid 150mL (3.10) was slowly added to a 350mL nitric acid (3.7), and cooled
spare.
3.14 aqueous ammonia (ρ = 0.90g/mL).
3.15 ammonia (11).
3.16 acetic acid - sodium acetate buffer solution (pH5.5). 150g of anhydrous sodium acetate dissolved in water, was added 15mL of glacial acetic acid, diluted with water to
1000mL, and mix.
3.17 solution of potassium thiocyanate (50g/L).
3.18 Lead standard solution. Weigh 1.0000g pure lead (wPb≥99.99%) in 250mL beaker, add 20mL of nitric acid (3.9), cover
Table dish, placed on a hot plate, a low temperature until completely dissolved by heating, boiling rid of nitrogen oxides, is removed, cooled to room temperature. Transferred 500mL Capacity
Flask, 10mL of nitric acid (3.8), diluted with water to volume, and mix. 1mL solution containing 2mg lead.
3.19 disodium edetate (Na2EDTA) standard titration solution [c (Na2EDTA) ≈0.01mol/L].
3.19.1 preparation. Weigh 3.7g disodium edetate (Na2EDTA · 2H2O) in 500mL beaker, add 50mL water
Dissolution, cooled and transferred to 1000mL volumetric flask, dilute with water to volume, and mix.
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