GB/T 14506.4-2010Methods for chemical analysis of silicate rocks - Part 4: Determination of aluminium oxide content (English PDF)

Foreword

GB/T 14506 "Methods for chemical analysis of silicate rocks" 30 consists of the following components.

--- Part 1. Determination of water absorption;

--- Part 2. Determination of combined water;

--- Part 3. Determination of the amount of silica;

--- Part 4. Determination of the amount of aluminum oxide;

--- Part 5. Determination of total iron content;

--- Part 6. Determination of calcium oxide content;

--- Part 7. Determination of the amount of magnesium oxide;

--- Part 8. Determination of the amount of titanium dioxide;

--- Part 9. Determination of the amount of phosphorus pentoxide;

--- Part 10. Determination of the amount of manganese oxide;

--- Part 11. Determination of the amount of sodium hydroxide and oxide;

--- Part 12. Determination of the amount of fluorine;

--- Part 13. Determination of sulfur content;

--- Part 14. Determination of ferrous oxide;

--- Part 15. Determination of the amount of lithium;

--- Part 16. Determination of the amount of rubidium;

--- Part 17. Determination of the amount of strontium;

--- Part 18. Determination of copper content;

--- Part 19. Determination of lead content;

--- Part 20. Determination of the amount of zinc;

--- Part 21. Determination of the amount of nickel and cobalt;

--- Part 22. Determination of the amount of vanadium;

--- Part 23. Determination of chromium;

--- Part 24. Determination of cadmium content;

--- Part 25. Determination of molybdenum and tungsten;

--- Part 26. Determination of cobalt content;

--- Part 27. Determination of nickel content;

--- Part 28. Determination of the amount of 16 major and minor components;

--- Part 29. 22 the amount of rare earth element determination;

--- Part 30. Determination of the amount of 44 elements.

This Part replaces GB/T 14506.4-1993 "Silicate rocks - Fluoride replacement complexometric titration of ozone The amount of aluminum. " Compared with the original part of this section, the main changes are as follows.

--- Increasing the normative references;

--- Increased warning, warning.

This section presents the People's Republic of China Ministry of Land Resources.

1 Scope

GB/T 14506 provisions of this part of the determination of silicate rocks in the amount of aluminum oxide.

This section applies to the determination of silicate rocks in the amount of aluminum oxide, aluminum oxide also applies to the amount of soil and stream sediments in Determination.

Measurement range. 3% to 20% of the amount of aluminum oxide.

2 Normative references

The following documents contain provisions which, through reference GB/T 14506 in this section constitute provisions of this section. For dated reference documents, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

Laboratory use specifications and test methods GB/T 6682 Analysis

GB/T 14506.1 Silicate rocks - Part 1: Determination of water adsorption

3 Principle

Sample with sodium carbonate melt, the filtrate was measured after separating the silica or with hydrofluoric acid, sulfuric acid, potassium pyrophosphate fusion Preparation of the solution was measured. In hydrochloric acid medium, so that with the addition of excess EDTA iron, aluminum, titanium and other complex, adjusted to pH6, semi-xylenol orange as Indicator, with zinc standard solution titration of excess EDTA, followed by addition of potassium fluoride substituted with aluminum, titanium complexed EDTA, zinc and then mark Standard solution titration released EDTA, this is aluminum, titanium alloy amount that was subtracted from the amount of titanium aluminum content.

4 Reagents

Unless otherwise stated in this section are consistent with the use of analytical reagent and GB/T 6682 analytical laboratory use in the analysis.

4.1 Potassium pyrosulfate.

4.2 Hydrofluoric acid (rho1.15g/mL). Warning --- toxic and corrosive hydrofluoric acid, the operation should wear gloves to prevent skin contact.

4.3 Ethanol.

4.4 Sulfate (11). Warning --- improper dilution risk prone.

4.5 Glacial acetic acid (rho1.05g/mL).

4.6 Acetic acid (11).

4.7 Hydrochloride (11).

4.8 Hydrochloride (19).

4.9 Aqueous ammonia (11).

4.10 Zinc acetate solution (50g/L).

4.11 Sodium fluoride solution (200g/L). Stored in plastic bottles.

4.12 Acetic acid - sodium acetate buffer solution (pH5.7). Weigh 200g of sodium acetate (NaAc · 3H2O) were dissolved in water and glacial acetic acid added 6mL