YS/T 745.6-2010Methods for chemical analysis of copper anode slime. Part 6: Determination of lead content. Na2EDTA titrimetric method (English PDF)

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.

Part is divided into 6 sections.

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. Tongling Nonferrous Metals Group Holdings Limited.

Participated in the drafting of this section. Beijing Mining Research Institute, Yunnan Copper Co., Ltd., Daye Nonferrous Metals Corporation, MCC gourd Lo Island Metal Corporation.

1 Scope

YS/T 745 This section specifies the determination of copper anode slime lead content.

This section applies to the determination of copper anode slime lead content. Measurement range. 10.00% - 25.00%.

2 Method summary

Sample with nitric acid, sulfuric acid and bromine dissolved, hydrobromic treatment to remove arsenic, antimony and tin. Lead and other interfering elements by precipitation of lead sulfate Separating the precipitate was dissolved in sodium acetate buffer solution, with xylenol orange as indicator, titrated with a standard solution titration Na2EDTA 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 ethanol.

3.2 bromine.

3.3 hydrobromide (rho1.42g/mL).

Nitrate 3.4 (rho1.42g/mL).

3.5 nitric acid (11).

3.6 nitric acid (14).

3.7 sulfate (11).

3.8 sulfur nitrate mixed acid. To a 350mL nitric acid (3.4) was added slowly with stirring 150mL sulfuric acid (rho1.84g/mL).

3.9 sulfuric acid (149).

3.10 hexamethylenetetramine solution (200g/L).

3.11 ammonia (rho0.90g/mL).

3.12 tartaric acid solution (100g/L).

3.13 buffer solution (pH5.5). Weigh 150g of anhydrous sodium acetate dissolved in water, was added 50mL of glacial acetic acid, diluted with water to 1000mL, Mix well.

3.14 XO solution (5g/L).

3.15 Lead standard solution. Weigh 1.0000g lead (>=99.99%) in 250mL beaker, add 20mL of nitric acid (3.6), cover the table Dish, placed on a hot plate, heated and dissolved low temperature, until complete dissolution of the oxides of nitrogen purge boiling, removed, cooled to room temperature. Transferred to 500mL Flask, supplemented with 10mL of nitric acid (3.5), diluted with water to volume, and mix. 1mL solution containing 2mg lead.