YS/T 1050.2-2015Methods for chemical analysis of lead antimony concentrates. Part 2: Determination of antimony content. Cerium sulfate 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 2.

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.

Participated in the drafting of this section. Tin Mine Twinkling Star Antimony Industry Co., Ltd., Liuzhou one hundred tough special Advanced Materials Co., Ltd., Guangxi Zhuang Analysis and Testing Center Autonomous Region, Guizhou Province Analysis and Testing Institute.

1 Scope

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

This section applies to the determination of antimony content lead-antimony concentrate in the measurement range (mass fraction) was 10.00% ~ 30.00%.

2 Method summary

Sample with sulfuric acid, potassium sulfate decomposition filter paper (after carbonization) as a reducing agent to pentavalent antimony reduced to trivalent. In hydrochloric acid medium, add phosphoric acid High iron mask, methyl orange, methylene blue as indicator, at 80 °C ~ 90 °C titration with cerium sulfate standard solution to the red Faded, mutation was bright green (yellow-green high iron) 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 potassium sulfate.

3.2 filter.

3.3 metal antimony (Sb mass fraction >=99.99%).

3.4 sulfate (rho = 1.84g/mL).

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

3.6 phosphoric acid (rho = 1.70g/mL).

3.7 ethanol.

3.8 hydrochloride (11).

3.9 sulfate (11).

3.10 cerium sulfate standard titration solution.