YS/T 521.1: Evolution and historical versions
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| YS/T 521.1-2024 | English | RFQ |
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(Chemical analysis methods for crude copper, black copper and anodic copper - Part 1: Determination of copper content)
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YS/T 521.1-2024
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| YS/T 521.1-2009 | English | 199 |
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Methods for chemical analysis of blister copper. Part 1: Determination of copper content. Iodimetry
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YS/T 521.1-2009
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| YS/T 521.1-2006 | English | 879 |
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Methods for chemical analysis of blister copper -- Determination of copper content
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YS/T 521.1-2006
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Basic data | Standard ID | YS/T 521.1-2024 (YS/T521.1-2024) | | Description (Translated English) | (Chemical analysis methods for crude copper, black copper and anodic copper - Part 1: Determination of copper content) | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.30 | | Date of Issue | 2024-10-24 | | Date of Implementation | 2025-05-01 | | Older Standard (superseded by this standard) | YS/T 521.1-2009, YS/T 716.1-2009, YS/T 1230.1-2018 | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies the method for determining the copper content in crude copper, black copper and anode copper. This standard applies to the determination of copper content in crude copper, black copper and anode copper. | YS/T 521.1-2009: Methods for chemical analysis of blister copper. Part 1: Determination of copper content. Iodimetry
---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.
Methods for chemical analysis of blister copper.Part 1. Determination of copper content.Iodimetry
ICS 77.120.30
H13
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 521.1-2006
Methods for chemical analysis of blister copper
Part 1. Determination of copper content Iodometry
Posted 2009-12-04
2010-06-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 521-2009 "blister chemical analysis method" is divided into six sections.
--- Part 1. Determination of copper content Iodometry
--- Part 2. Determination of the amount of gold and silver fire assay
--- Part 3. Determination of arsenic content
Method 1 Hydride Generation - Atomic Fluorescence Spectrometry
Method 2 potassium bromate titration
--- Part 4. lead, bismuth, antimony content - Flame Atomic Absorption Spectrometry
--- Part 5. Determination of zinc and nickel content by flame atomic absorption spectrometry
--- Part 6. Inductively coupled plasma atomic arsenic, lead, bismuth, antimony, zinc and nickel emission spectrometry
This section YS/T 521 - Part 1.
"Methods for chemical analysis of blister copper - Determination of copper content" in this section instead of YS/T 521.1-2006 (formerly GB/T 5120.1-1995). versus
YS/T 521.1-2006 compared to this part of the following changes.
--- Text format has been modified;
--- Complements the precision and quality assurance and control provisions.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This section is responsible for drafting unit. Daye Nonferrous Metals Company.
Participated in the drafting of this section. Beijing Mining Research Institute, Jiangxi Copper Corporation, Jinchuan Group Limited.
The main drafters of this section. Wang Yongbin, XIAO Ze red, ginger seeking Tao Feng advanced, Huang Chunyan Tang Hua whole, tiger rainbow, Populus.
This part of the standard replaces the previous editions are.
--- GB 5120.1-1985, GB/T 5120.1-1995;
--- YS/T 521.1-2006.
Methods for chemical analysis of blister copper
Part 1. Determination of copper content Iodometry
1 Scope
YS/T 521 This part specifies the determination method of blister copper content.
This section applies to the determination of copper content of blister copper. Measurement range. 97.50% - 99.70%.
2 Method summary
The sample is dissolved in nitric acid, trivalent arsenic and antimony oxidation with bromine, control solution pH 3-4, with hydrogen fluoride ammonium iron mask. Iodide
The role of potassium and divalent copper, iodine precipitated starch as indicator, titrated with sodium thiosulfate standard solution titration.
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 potassium iodide.
3.2 Ammonia (ρ0.90g/mL).
3.3 Glacial acetic acid (ρ1.05g/mL).
3.4 nitric acid (1 + 2).
3.5 saturated solution of ammonium hydrogen fluoride. Store in a polyethylene bottle.
3.6 bromine saturated solution.
3.7 solution of potassium thiocyanate (200g/L).
3.8 starch solution (5g/L).
3.9 sodium thiosulfate standard titration solution [Ba (Na2S2O3 · 5H2O) ≈0.1mol/L].
3.9.1 preparation.
Weigh 250g of sodium thiosulfate (Na2S2O3 · 5H2O), placed in a beaker of 1000mL dissolved, add 2g of anhydrous sodium carbonate, moved
10L brown reagent bottle with boiled and cooled distilled water diluted to about 10L, added 1mL chloroform, shake well and let stand 10 days
the above. When using a filter, additional 1mL chloroform, mix, stand for 2h.
3.9.2 Calibration.
Weigh 3.00g (accurate to 0.0001g) treated copper sheet (mass fraction ≥99.95%) in triplicate. The following press 5.2.1 - 5.2.4
And sample simultaneously.
NOTE. Processing of copper sheet, copper sheet into the simmering glacial acetic acid (1 + 4) in micro-boiling 1min, after removing the water and ethanol were rinsed twice. in
100 ℃ oven bake 4min, cooling, grinding mouth reagent bottle placed on standby.
According to formula (1) calculate the actual concentration of sodium thiosulfate standard solution.
Vp 1 × 63.55
(1)
Where.
Ba --- the actual concentration of sodium thiosulfate standard titration solution, expressed in moles per liter (mol/L);
--- Copper sheet copper mass fraction (%);
When Vp 1 --- Calibration liquid titration copper consumption volume of sodium thiosulfate standard titration solution, in milliliters (mL);
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