GB/T 15922-2010Method for chemical analysis of cobalt ores - Determination of cobalt content (English PDF)

1 Scope

This standard specifies the acid dissolution or alkali fusion after separating prepared acidic solution, spectrophotometric determination of cobalt ore cobalt atomic absorption method.

This standard applies to the determination of cobalt content of cobalt ore.

Measuring range. 0.05% to 2.0% cobalt.

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.

Laboratory use specifications and test methods GB/T 6682 Analysis

Principle 3

Sample hydrofluoric acid, after aqua regia, perchloric acid decomposition with hydrochloric acid dissolved salt (or sodium peroxide, sodium hydroxide melt ore, water extraction, filtration,

The precipitate was dissolved in hydrochloric acid) in 5% hydrochloric acid medium, atomic absorption spectrophotometer, at a wavelength of 252.1nm, using air - acetylene fire

Flame, cobalt absorbance was measured to calculate the amount of cobalt.

4 Reagents

Unless otherwise indicated, the use of analytical reagents and in line with GB/T 6682 or equivalent purity distilled water in the analysis.