YS/T 244.8-2008Chemical analysis methods of high purity aluminum. Part 8: Determination of indium content by extraction-crystal violet photometric method (English PDF)

Foreword

YS/T 244 "Chemical analysis methods of high purity aluminum" is divided into nine sections.

--- Part 1. phenanthroline - thiocyanate spectrophotometric determination of iron content;

--- Part 2. molybdenum blue extraction and spectrophotometric determination of silicon content;

--- Part 3. Two-antipyrine DAM - spectrophotometric determination of titanium content thiocyanate;

--- Part 4. Butyl Rhodamine B spectrophotometric determination of gallium content;

--- Part 5. Determination of copper, zinc and lead content anodic stripping voltammetry;

--- Part 6. Catalytic manganese - sulfuric acid system through the determination of silver content;

--- Part 7. dithizone extraction and spectrophotometric determination of cadmium content;

--- Part 8. crystal violet extraction and spectrophotometric determination of indium content;

--- Part 9. Determination of impurities by inductively coupled plasma mass spectrometry.

This section 8.

This part is YS/T 275-2000 "high purity" in the revised Appendix A, the main changes are as follows.

--- Added "repeatability" clause;

--- Increase the "quality assurance and control" clause.

The non-ferrous metal part by the National Standardization Technical Committee and centralized.

This part of the Fushun Aluminum Co., Ltd., China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting.

This part of the Fushun Aluminum Co. drafted.

1 Scope

This section specifies the determination method of high purity indium content.

This section applies to the determination of high purity indium content. Measurement range. ~ 0.00002% 0.00050%.

2 Method summary

Specimens with hydrochloric acid, nitric acid dissolution. Indium and indium bromide hydrobromide role in the formation of complexes, extracted with butyl acetate, and then hydrochloric acid after stripping, Indium and crystal violet, and then extracted with benzene, photometrically.

3 Reagents

Reagent preparation and analysis of water are deionized water and then purified by distillation quartz distiller.

3.1 ethanol, pure class distinctions.

3.2 hydrochloric acid (rho1.19g/mL), pure class distinctions.

3.3 hydrochloric acid (1 + 1), pure class distinctions.

3.4 hydrochloric acid (1 + 3), pure class distinctions.

3.5 nitrate (rho1.42g/mL), pure class distinctions.

3.6 hydrobromide (7mol/L).

3.7 hydrobromic acid (5mol/L).

3.8 butyl acetate.

3.9 Hydrogen peroxide (300g/L).

3.10 sulfuric acid [Ba (H2SO4) = 2.5mol/L], pure class distinctions.

3.11 Ascorbic acid (10g/L).

3.12 potassium iodide (4mol/L).

Sodium thiosulfate 3.13 (0.1mol/L).

3.14 crystal violet (1g/L).

3.15 benzene.

3.16 indium standard stock solution. Weigh 1.0000g indium (99.99%), placed in 300mL beaker. Add salt 20mL ~ 30mL of Acid (3.3), heated in a water bath until completely dissolved. After cooling to room temperature, the solution is transferred 1000mL volumetric flask, dilute to the mark with water, Mix well. This solution 1mL 1mg containing indium.

3.17 Indium standard solution. Pipette 10.00mL indium standard stock solution (3.16) in 100mL volumetric flask, dilute to the mark, mix uniform. Then from this solution Pipette 10.00mL solution in 100mL volumetric flask, dilute with water to volume, and mix. This solution containing 1mL 1µg indium.

4 Instruments and equipment

Spectrophotometer.