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YS/T 745.5-2010 English PDF

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YS/T 745.5-2010: Methods for chemical analysis of copper anode slime. Part 5: Determination of tellurium content. Potassium dichromate titrimetric method
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YS/T 745.5-2010English159 Add to Cart 3 days [Need to translate] Methods for chemical analysis of copper anode slime. Part 5: Determination of tellurium content. Potassium dichromate titrimetric method Valid YS/T 745.5-2010

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Basic data

Standard ID YS/T 745.5-2010 (YS/T745.5-2010)
Description (Translated English) Methods for chemical analysis of copper anode slime. Part 5: Determination of tellurium content. Potassium dichromate titrimetric method
Sector / Industry Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard H14
Classification of International Standard 77.120.01
Word Count Estimation 6,686
Date of Issue 2010-11-22
Date of Implementation 2011-03-01
Regulation (derived from) MIIT (2010) No. 126
Issuing agency(ies) Ministry of Industry and Information Technology
Summary This standard specifies the copper anode mud method for determination of tellurium. This standard applies to copper anode mud tellurium content. Measuring range: 0. 50% 10. 00%.

YS/T 745.5-2010: Methods for chemical analysis of copper anode slime. Part 5: Determination of tellurium content. Potassium dichromate titrimetric method


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Methods for chemical analysis of copper anode slime.Part 5. Determination of tellurium content.Potassium dichromate titrimetric method ICS 77.120.01 H14 People's Republic of China Nonferrous Metals Industry Standard Methods for chemical analysis of copper anode slime Part 5. Determination of tellurium content Dichromate method Part 5. Determinationofteluriumcontent- Issued on. 2010-11-22 2011-03-01 implementation Ministry of Industry and Information Technology of the People's Republic of China released

Foreword

YS/T 745 "Methods for chemical analysis of copper anode mud" is divided into nine sections. --- Part 1. Determination of copper content iodometry; --- Part 2. gold and silver content determination fire assay gravimetric method; --- Part 3. the amount of platinum and palladium contents - fire assay enrichment - Inductively coupled plasma atomic emission spectrometry; --- Part 4. Determination of the amount of selenium iodometry; --- Part 5. Determination of tellurium content dichromate method; --- Part 6. Determination of lead content Na2EDTA titration; --- Part 7. Determination of bismuth content - Flame atomic absorption spectrometric method and Na2EDTA titration; --- Part 8. Determination of arsenic content by hydride generation - atomic fluorescence spectrometry; --- Part 9. Determination of antimony content - Flame atomic absorption spectrometry. This is Part 5. This section is in accordance with GB/T 1.1-2009 given rules drafted. The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized. This section is responsible for drafting unit. Daye Nonferrous Metals Corporation. This section is drafted. Jiangxi Copper Company Limited. Participated in the drafting of this section. Daye Nonferrous Metals Co., Ltd., Guangzhou Nonferrous Metal Research Institute, Yunnan Copper Co., Ltd., Jinchuan Group Limited. The main drafters of this section. Qiuji Ying Liang subsets, Yang Yudong, Shi Xiaoying, drip - Daifeng Ying, Lin Shan, Sun Hongying, Chen Yu Bin, Zheng Wenying, Liangyu Xia, Du Tao. Methods for chemical analysis of copper anode slime Part 5. Determination of tellurium content Dichromate method

1 Scope

YS/T 745 This section specifies the determination of copper anode mud tellurium content. This section applies to the determination of copper anode mud tellurium content. Measuring range. 0.50% to 10.00%.

2 Method summary

The sample is dissolved in nitric acid, sulfuric acid, hydrochloric acid (3.2) medium, with tin dichloride reduction to elemental tellurium tellurium, copper, arsenic, antimony, bismuth, lead, big The amount of impurities separation. After acid precipitation to dissolve, adding an excess of potassium dichromate standard titration solution oxyalkylene telluric acid, and then to drop the standard ferrous ammonium sulfate Set back titration of excess potassium dichromate solution.

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 hydrochloride (ρ1.19g/mL). 3.2 hydrochloric acid (3565). Nitrate 3.3 (ρ1.42g/mL). 3.4 nitric acid (11). 3.5 sulfate (ρ1.84g/mL). 3.6 tartaric acid. 3.7 tin dichloride (250g/L). Weigh 25g of stannous chloride dihydrate in 150mL beaker, add hydrochloric acid (3.2) and treated with hydrochloric acid to dissolve (3.2) diluted to 100mL. 3.8 parathion mixed acid. sulfuric acid phosphoric acid water (151,570). 3.9 diphenylamine sodium solution (10g/L). Weigh 0.5g of sodium diphenylamine in 100mL beaker, dissolved in water and diluted to 50mL. 3.10 potassium dichromate (1/6K2Cr2O7) standard titration solution. Weigh 1.4710g advance constant weight of 120 ℃ baseline potassium dichromate, placed 200mL beaker with a small amount of water dissolved and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This concentration is c1/6K2Cr2O7 = 0.03000mol/L. 3.11 ammonium ferrous sulfate standard titration solution 3.11.1 preparation. Weigh 11.7639g Ferrous ammonium sulfate [(NH4) 2Fe (SO4) 2 · 6H2O] was dissolved in 300mL of sulfuric acid (15) was , Add water 700mL, and mix. 3.11.2 Calibration. accurate Pipette four potassium dichromate standard titration solution were placed in advance 20.00mL added 100mL of water, 5mL sulfur Phosphorus mixed acid 250mL beaker, with the following analysis step. According to equation (1) calculate the standard ferrous ammonium sulfate titration solution of potassium dichromate standard titration solution titration coefficient (k). k = V01V02 (1)

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