YS/T 1050.1-2015Methods for chemical analysis of lead antimony concentrates - Part 1: Determination of lead content - Na2EDTA titration method (English PDF)

Foreword

YS/T 1050-2015 "Methods for chemical analysis of lead-antimony concentrate" is divided into the following nine sections.

--- Part 1. Determination of lead content Na2EDTA titration;

--- Part 2. Determination of antimony content cerium sulfate titration;

--- Part 3. Determination of arsenic content potassium bromate titration;

--- Part 4. Determination of zinc contents Na2EDTA titration;

--- Part 5. Determination of sulfur content - Gravimetric method;

--- Part 6. Determination of iron content cerium sulfate titration;

--- Part 7. Determination of the amount of bismuth and copper - Flame atomic absorption spectrometry amount;

--- Part 8. gold and silver content determination fire assay;

--- Part 9. Determination of the amount of silver by flame atomic absorption spectrometry.

This is Part 1.

This section drafted in accordance with GB/T 1.1-2009 given rules.

The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.

This section is responsible for drafting unit. Guangxi Metallurgical Product Quality Supervision and Inspection Station.

This section is drafted. Guangxi China Tin Group Co., Ltd.

Participated in the drafting of this section. Beijing Mining Research Institute, Guangxi Zhuang Autonomous Region Analysis and Testing Center, China Certification & Inspection Group Ltd., Guangxi, Guilin University of Technology.

1 Scope

This section YS/T 1050 specifies the method for determination of lead-antimony concentrates of lead content.

This section applies to the determination of the amount of lead in lead-antimony concentrate, the measurement range (mass fraction) was 14.00% ~ 34.00%.

2 Method summary

Sample by sulfuric acid, nitric acid is dissolved, remove arsenic, antimony and tin with hydrobromic acid. Lead to lead sulfate precipitation and other interfering elements separated precipitate Dissolved in a pH value of 5.5 to 6.0 acid - sodium acetate buffer solution, with xylenol orange as indicator, titrate with standard Na2EDTA to the solution from purple turns bright yellow as the end point.

3 Reagents

Unless otherwise indicated, this part of the reagents were analytical reagent, the water for the two water.

3.1 metallic lead (Pb mass fraction >=99.99%).

3.2 sodium fluoride.

3.3 sulfate (rho = 1.84g/mL).

3.4 nitric acid (rho = 1.42g/mL).

3.5 hydrobromide (rho = 1.49g/mL).

3.6 ethanol.

3.7 ascorbic acid.

3.8 nitric acid (19).

3.9 sulfate wash (298).

3.10 acetic acid - sodium acetate buffer solution. Weigh 200g of sodium acetate [CH3COONa · 3H2O] was dissolved in water, was added 10mL of glacial acetic acid, Diluted with water to 1000mL, and mix.