GB/T 8208-2007Determination of gallium in coal (English PDF)

1 Scope

This standard specifies the base molten gallium in coal - Extraction Separation - Rhodamine B spectrophotometric acid and molten - The extraction - Rhodamine B

Spectrophotometric method summary, reagent materials, equipment, test procedures, results are expressed and precision of the method and the like.

This standard applies to lignite, bituminous coal and anthracite, the measurement range (1 ~ 100) µg/g.

Arbitration analysis should be used alkali fusion - The extraction - Rhodamine B spectrophotometric method.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

Analysis Method GB/T 212 coal (GB/T 212-2001, eqv ISO 11722.1999, eqv ISO 1171.1997, eqv ISO 562.1998)

GB/T 483 coal analysis test methods - General provisions

3 Method summary

Coal ash after molten alkali, hydrochloric acid, evaporated to dryness and dehydration silicic acid, or sulfuric acid, hydrochloric acid, hydrofluoric acid mixture exploded. The melt

Or decomposition with 6mol/L hydrochloric acid dissolved in a solution of titanium trichloride eliminate the influence of interfering elements, added to a solution of rhodamine B with chlorine gallate

Forming a colored complex with benzene - ether extract, and then measured using a spectrophotometer.

4 Reagents and materials