GB/T 15926-2010Method for chemical analysis of bismuth ores - Determination of bismuth content (English PDF)

1 Scope

This standard specifies the method for the determination of bismuth ores of bismuth content.

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

Measuring range. 0.1% or more of bismuth.

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

Samples with hydrochloric acid, nitric acid, perchloric acid decomposition, nitric acid medium at pH 1.5 to 2.0, and ascorbic acid with vanadium (V) and iron (III), thiourea, tartaric acid masking interference copper, antimony, tin, thorium, zirconium, niobium, with the xylenol orange indicator, with EDTA standard solution drops

Set by the amount of consumption of EDTA standard solution, calculate the amount of bismuth.

4 Reagents

Unless otherwise indicated in the analysis are consistent with the use of analytical reagents and GB/T 6682 water analytical laboratory.