YS/T 509.4-2008Methods for chemical analysis of spodumene and lepidolite concentrates. Determination of aluminium oxide content. EDTA compleximetric method (English PDF)

Foreword

YS/T 509 "Methods for chemical analysis of spodumene and lepidolite

concentrates" consists of the following 11 parts:

- Part 1: Determination of lithium oxide sodium oxide and potassium oxide

contents - Flame atomic absorption spectrometric method;

- Part 2: Determination of rubidium oxide and caesium oxide contents -

Flame atomic absorption spectrometric method;

- Part 3: Determination of silicon dioxide content - Gravimetric-

molybdenum blue photometric method;

- Part 4: Determination of aluminum oxide content - EDTA compleximetric

method;

- Part 5: Determination of ferric oxide content - O-phenanthroline

photometric method and EDTA compleximetric method;

- Part 6: Determination of phosphorus pentoxide content - The

molybdenum blue photometric method;

- Part 7: Determination of beryllium oxide content – Chromazurol S and

cetyltrimethyl ammonium bromide spectrophotometric met;

- Part 8: Determination of calcium oxide and magnesium oxide content -

Flame atomic absorption spectrometric method;

- Part 9: Determination of fluorine content - lon selective electrode method;

- Part 10: Determination of manganous oxide content-Persulfate oxidation

photometric method;

- Part 11: Determination of loss on ignition - Gravimetric method.

This Part is Part 4.

This Part replaces YS/T 509.4-2006 "Methods for chemical analysis of

spodumenite and lepidolite concentrates The EDTA volumetric method for the

determination of aluminum oxide content" (previous edition is GB/T 3885.4-

1983).

Compared with YS/T 509.4-2006, the main changes in this Part are as follows:

- modified the titer (T) of lead standard solution and aluminum oxide to the

concentration of the substance;

Methods for chemical analysis of spodumene and

lepidolite concentrates - Determination of aluminum

oxide content - EDTA compleximetric method

1 Scope

This Part specifies the determination methods for aluminum oxide content in

spodumene, lepidolite concentrates.

This Part is applicable to the determination of aluminum oxide content in

spodumene, lepidolite concentrates. Determination range: 10.00%~30.00%.

2 Method summary

The test material is melted with potassium hydroxide. Use water to leach.

Pipette part of the solution. Add excessive EDTA. Boil complexed aluminum at

pH5~pH6. Excessive EDTA uses xylenol orange as indicator. Use lead standard

solution to back drip. Add fluoride. Use lead standard solution to titrate the

released EDTA. Calculate the amount of aluminum oxide from the volume of

lead standard solution consumed.

3 Reagents

Unless otherwise stated, only the confirmed analytically-pure reagents and

distilled water or water of comparable purity are used in the analysis.

4 Specimen

5 Analysis steps