YS/T 575.15-2007Methods for chemical analysis of bauxite. Part 15: Determination of gallium oxide content. Rhodamine B-extraction photometric method (English PDF)

Foreword

YS/T 575-2007 "chemical analysis of bauxite -" Is the YS/T 575-2006 (formerly GB/T 3257-1999) amendments A total of 24 parts.

--- Part 1. aluminum oxide content - EDTA titration

--- Part 2. silica content - Gravimetric - molybdenum blue spectrophotometry

--- Part 3. Determination of silica content molybdenum blue photometric

--- Part 4. iron oxide content - Potassium dichromate titration

--- Part 5. Determination of iron oxide content phenanthroline spectrophotometry

--- Part 6. Determination of titanium dioxide content di Zhao DAM spectrophotometry

--- Part 7. calcium oxide content - Flame Atomic Absorption Spectrometry

--- Part 8. magnesium oxide content - Flame Atomic Absorption Spectrometry

--- Part 9. potassium hydroxide, sodium oxide content - Flame Atomic Absorption Spectrometry

--- Part 10. Determination of manganese oxide content by flame atomic absorption spectrometry

--- Part 11. chromium oxide content - Flame Atomic Absorption Spectrometry

--- Part 12. Determination of vanadium pentoxide content of benzoyl phenylhydroxylamine photometric method

--- Part 13. Determination of zinc content by flame atomic absorption spectrometry

--- Part 14. Determination of total rare earth oxide Tribromoarsenazo spectrophotometry

--- Part 15. Determination of gallium oxide content of rhodamine B extraction spectrophotometry

--- Part 16. Determination of phosphorus pentoxide molybdenum blue photometric

--- Part 17. Determination of sulfur content - Combustion - iodometric method

--- Part 18. Determination of total carbon content - Combustion - non-aqueous titration

--- Part 19. Determination of burning weight reduction method

--- Part 20. pre-dried sample preparation

--- Part 21. Determination of organic carbon titration

--- Part 22. Analysis of samples moisture intrudes content - Gravimetric method

--- Part 23. Determination of the chemical composition of the X-ray fluorescence spectrometry

--- Part 24. Determination of carbon and sulfur content infrared absorption method this is Part 15.

The partial replacement of YS/T 575.15-2006 (formerly GB/T 3257.16-1999).

This section is amended to YS/T 575.15-2006, compared with YS/T 575.15-2006, the main changes are as follows.

--- The drying temperature of the sample unified 110 °C ± 5 °C;

--- Increased precision.

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

This part of the Aluminum Corporation of China Zhengzhou Research Institute is responsible for drafting.

This section drafted by the Aluminum Corporation of China Shanxi Branch.

1 Scope

This section specifies the determination method of bauxite in the gallium oxide content.

This section applies to the determination of bauxite in the gallium oxide content measurement range. 0.002% to 0.050%.

2 Method summary

Sample in 5.5mol/L HCl medium, with toluene - methyl isobutyl ketone solvent extraction of gallium chloride, and Rhodamine B which form A colored complex, the absorbance was measured its color at a wavelength of 555nm at a solution.

Interference ferric iron by titanium trichloride reductive elimination.

3 Reagents

3.1 sodium hydroxide, pure class distinctions.

3.2 sodium peroxide.

3.3 hydrochloride (rho1.19g/mL).

3.4 hydrochloric acid (5.5mol/L).

3.5 titanium trichloride solution (150g/L).

3.6 Rhodamine B solution (5g/L). The 1.00g Rhodamine B dissolved in hydrochloric acid (3.4) Shifting 200mL flask with hydrochloric acid (3.4) Dilute to the mark.

3.7 Toluene - Methyl isobutyl ketone mixed solvent. 6 parts of toluene were mixed with 3.5 parts of methyl isobutyl ketone.

Gallium trioxide 3.8 standard stock solution.

Weigh 0.1000g gallium oxide (spectroscopically pure) in 250mL beaker, add 100mL of hydrochloric acid (3.4), placed on a water bath heated solution Solution, removed, cooled to room temperature and transferred to 1000mL volumetric flask, dilute to the mark with hydrochloric acid (3.4) and shake. This solution contains per milliliter 0.1mg of gallium oxide.

3.9 gallium oxide standard solution.

Dispensing 10.00mL gallium oxide standard stock solution (3.8) in 1000mL volumetric flask (3.4) diluted to the mark with dilute hydrochloric acid Degree, shake. 0.001mg per ml solution of gallium oxide.

4 Instrument

Spectrophotometer.

5 Sample

The sample was ground with a mortar through 150µm sieve, the sample is placed in a good research at 110 °C ± 5 °C oven drying 2h, placed in a desiccator, cooled but to room temperature before use.