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Methods for chemical analysis of low grade blister. Part 1: The determination of copper content. Sodium hyposulfite titration
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Basic data | Standard ID | YS/T 716.1-2009 (YS/T716.1-2009) | | Description (Translated English) | Methods for chemical analysis of low grade blister. Part 1: The determination of copper content. Sodium hyposulfite titration | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.040.30 | | Word Count Estimation | 5,589 | | Date of Issue | 2009-12-04 | | Date of Implementation | 2010-06-01 | | Regulation (derived from) | MIIT [2009] No. 66 | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies: Cu copper determination of the amount of black. This standard applies to black copper Cu measured, measuring range: 80. 00 % 95. 00%. | YS/T 716.1-2009: Methods for chemical analysis of low grade blister. Part 1: The determination of copper content. Sodium hyposulfite titration
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Methods for chemical analysis of low grade blister.Part 1. The determination of copper content.Sodium hyposulfite titration
ICS 77.040.30
H13
People's Republic of China Nonferrous Metals Industry Standard
Methods for chemical analysis of copper black
Part 1. Determination of copper content
Sodium thiosulfate titration
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 716.1-2009 "chemical analysis of black copper" is divided into six parts.
--- Part 1. Determination of copper content of sodium thiosulfate titration;
--- Part 2. Determination of the amount of gold and silver fire assay;
--- Part 3. Flame atomic bismuth, nickel, lead, antimony and zinc content absorption spectrometry;
--- Part 4. Determination of arsenic content iodometry;
--- Part 5. Determination of tin content potassium iodate titration;
--- Part 6. arsenic, bismuth, nickel, lead, antimony, tin, zinc content - Inductively coupled plasma atomic emission spectrometry.
This section YS/T Part 1 716.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This section is responsible for drafting unit. Tongling Nonferrous Metals Group Holdings Limited.
Participated in the drafting of this section. CRIMM, Chinalco Luoyang Copper Co., Ltd., Guangzhou Nonferrous Metal Research Institute.
The main drafters of this section. Shao from and, Liqin Mei, real Wang Fu, Xiao-Yan Chen, Fu Rao, Yang Lin, Wang Yan, Huang Pu Ying, Zhang Jin.
Methods for chemical analysis of copper black
Part 1. Determination of copper content
Sodium thiosulfate titration
1 Scope
YS/T of the provisions of section 716 of the determination of copper content of black copper.
This section applies to the determination of copper in copper black, measuring range. 80.00% - 95.00%.
2 Method summary
Sample with nitric acid, hydrochloric acid and bromine dissolved trivalent arsenic and antimony oxidation with bromine, control solution of pH3.0 ~ pH4.0, masked with ammonium bifluoride
Iron, potassium iodide and cupric role precipitated iodine with starch as indicator, titrated with standard sodium thiosulfate solution titrated.
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 copper (Cu content is not less than 99.99%). The copper into simmering glacial acetic acid (3.9), the micro-boiling 1min, after removing the water
And ethanol were rinsed twice more, bake 4min, cooling, grinding jar is placed in standby 100 ℃ oven.
3.3 bromine.
3.4 ethanol.
Nitrate 3.5 (ρ1.42g/mL).
3.6 hydrochloride (ρ1.19g/mL).
3.7 Glacial acetic acid (ρ0.90g/mL).
3.8 nitric acid (1 + 1).
3.9 Glacial acetic acid (1 + 3).
3.10 ferric chloride solution (100g/L).
3.11 ammonium acetate solution (300g/L). Weigh 90g of ammonium acetate and placed in 400mL beaker, add water 50mL and 100mL ice acetic
Acid, dissolved, diluted with water to 300mL, and mix the solution to pH5.
3.12 saturated ammonium hydrogen fluoride solution. Store in a polyethylene bottle.
3.13 potassium thiocyanate solution (100g/L). Weigh 10g of potassium thiocyanate in the 400mL beaker, add 100mL dissolved in water (pH < 7),
After addition of 2g of potassium iodide was added 2mL starch solution, a solution of iodine solution (about 0.04mol/L) of just blue, and then sodium thiosulfate
Standard Solution titration to blue just disappears.
3.14 Starch (5g/L).
3.15 sodium thiosulfate standard titration solution .( Ba Na2S2O3 · 5H2O = 0.1mol/L).
3.15.1 preparation. Weigh 250gNa2S2O3 · 5H2O and 2g of anhydrous sodium carbonate into 500mL beaker, distilled boiled cooled
Dissolved in water, filtered in a brown reagent bottle 10L, 10L as described above was diluted to about distilled water is added 1mL chloroform, shake well and let stand
Two weeks.
3.15.2 Calibration. Weigh 3g (accurate to 0.0001g) copper (3.2) in triplicate. 5.3.1 ~ 5.3.4 with the following measurement sample was measured with
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