YS/T 461.4: Evolution and historical versions
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| YS/T 461.4-2024 | English | RFQ |
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(Chemical analysis method for mixed lead-zinc concentrate - Part 4: Determination of arsenic content - Ammonium ferrous sulfate titration)
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YS/T 461.4-2024
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| YS/T 461.4-2013 | English | 279 |
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Methods for chemical analysis of lead and zinc bulk concentrates. Part 4: The determination of arsenic content lodimetricic method
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YS/T 461.4-2013
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| YS/T 461.4-2003 | English | 239 |
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The methods for chemical analysis of lead and zinc mixed concentrates-The determination of arsenic content-The iodimetric method
| Obsolete |
YS/T 461.4-2003
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Basic data | Standard ID | YS/T 461.4-2024 (YS/T461.4-2024) | | Description (Translated English) | (Chemical analysis method for mixed lead-zinc concentrate - Part 4: Determination of arsenic content - Ammonium ferrous sulfate titration) | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.60 | | Date of Issue | 2024-10-24 | | Date of Implementation | 2025-05-01 | | Older Standard (superseded by this standard) | YS/T 461.4-2013 | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies the determination method of arsenic content in mixed lead-zinc concentrate. Method 1 is iodine titration method and method 2 is atomic fluorescence spectrometry. This standard is applicable to the determination of arsenic content in mixed lead-zinc concentrate. | YS/T 461.4-2013: Methods for chemical analysis of lead and zinc bulk concentrates. Part 4: The determination of arsenic content lodimetricic 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.
Methods for chemical analysis of lead and zinc bulk concentrates Part 4. The determination of arsenic content lodimetricic method
ICS 77.120.60
H13
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 461.4-2003
Lead and Zinc concentrates - Methods
Part 4. Determination of arsenic content
Iodine titration
Part 4. Thedeterminationofarseniccontent-
Issued on. 2013-10-17
2014-03-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 461 "Lead and Zinc concentrates - Methods" is divided into 11 parts.
--- Part 1. Determination of the amount of lead and zinc content Na2EDTA precipitation titration;
--- Part 2. Determination of iron content Na2EDTA titration;
--- Part 3. Determination of sulfur content of combustion - neutralization titration method;
--- Part 4. Determination of arsenic content of iodine titration;
--- Part 5. Determination of silicon dioxide content - Molybdenum blue spectrophotometric method;
--- Part 6. Determination of the amount of mercury atomic fluorescence spectrometry;
--- Part 7. Determination of cadmium content by flame atomic absorption spectrometry;
--- Part 8. Determination of copper content - Flame atomic absorption spectrometry;
--- Part 9. Determination of the amount of silver by flame atomic absorption spectrometry;
--- Part 10. the amount of gold and silver contents - fire assay;
--- Part 11. arsenic, bismuth, cadmium, cobalt, copper, nickel, antimony content - Inductively Coupled Plasma - Atomic Emission Spectrometry.
This section YS/T Part 4 461.
This section drafted in accordance with GB/T 1.1-2009 given rules.
The partial replacement of YS/T 461.4-2003 "Lead and Zinc concentrates - Determination of arsenic content of iodine titration method", and
YS/T 461.4-2003 compared to the main changes are as follows.
--- Text format has been modified;
--- Added "reproducibility" clause, delete the words "to allow poor" clause;
--- Added "the test report" requirement.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
YS/T 461 is responsible for drafting. Shenzhen Lingnan Nonferrous Metals Co., Baiyin Nonferrous Metals Group Co., Ltd.,
Beijing General Research Institute of Mining and Metallurgy.
This section is responsible for drafting. Shenzhen Lingnan Nonferrous Metals Co., Ltd. Shaoguan smelter.
Participated in the drafting of this section. Baiyin Nonferrous Metals Group Co., Ltd., Shenzhen Lingnan Nonferrous Metals Co. Fankou lead
Zinc, Beijing Mining Research Institute, Henan Yuguang Gold & Lead Co., Ltd participated in the drafting.
The main drafters of this section. Yuan Lili, Zhengshao Juan, Zhang Rui, Sunguang Yan, Tangrong Ming, Luo Fu Xing, Zhang Wei, Dian Chen Geng, Zhou Junling, Xu Lijun.
This part of the standard replaces the previous editions are.
--- YS/T 461.4-2003.
Lead and Zinc concentrates - Methods
Part 4. Determination of arsenic content
Iodine titration
1 Scope
This section YS/T 461 provides for the determination of arsenic content in Lead and Zinc Concentrate.
This section applies to the determination of arsenic content in Lead and Zinc Concentrate. Measuring range. 0.10% to 1.00%.
2 Method summary
Sample with nitric acid, sulfuric acid decomposition, nitrogen oxides sulfuric smoke removed in hydrochloric acid (11) medium with hypophosphite as reducing arsenic
Elemental arsenic, filtration, separation and coexistence elements. Sodium bicarbonate weakly alkaline medium, with an excess of elemental iodine dissolved arsenic standard solution, adding a certain
The volume of excess sodium arsenite solution of iodine to react with the remaining standard titration solution, and then with starch as indicator, titrated with iodine titration solution over standard
The amount of sodium arsenite solution titration solution volume solution of sodium arsenite arsenic content is calculated according to consumption of iodine standard.
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 hypophosphite.
3.2 sodium bicarbonate.
3.3 tartaric acid.
3.4 nitric acid (ρ = 1.42g/mL).
3.5 sulfate (ρ = 1.84g/mL).
3.6 hydrochloric acid (ρ = 1.19g/mL).
3.7 hydrochloride (11).
3.8 sulfate (13).
3.9 copper sulphate solution (50g/L).
3.10 stannous chloride solution (100g/L). Weigh 10g of stannous chloride with 100mL of hydrochloric acid (3.7) heat gently to dissolve completely.
3.11 hypophosphite lotion (5g/L), the time is now equipped with.
3.12 lotion ammonium chloride (50g/L).
3.13 phenolphthalein indicator (1g/L). Weigh 0.1g of phenolphthalein was dissolved in 100mL of ethanol.
3.14 starch indicator (5g/L). Weigh 0.5g soluble starch in 200mL beaker, add a little water into a paste, add boiling 100mL
Water, stir, boil until transparent. The time is now equipped with.
3.15 Iodine Standard Solution.
3.15.1 preparation. Weigh 6.4g iodine, 20.0g of potassium iodide in 400mL beaker, add 200mL water, stir to dissolve completely in the filter
1000mL brown volumetric flask, dilute with water to volume, and mix. Calibration after leaving for a week.
3.15.2 Calibration. Weigh 0.060g (accurate to 0.0001g) previously dried to a constant weight of arsenic trioxide in sulfuric acid dryer (wAs2O3≥
99.99%) in the 250mL beaker was added 0.5g of sodium hydroxide, 50 mL water, low completely dissolved by heating, cooling removed. Add 1 drop of phenol
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