GB/T 6730.14-2017Iron ores—Determination of calcium content—Flame atomic absorption spectrometric method (English PDF)

1 Scope

GB/T 6730 provisions of this part of the flame atomic absorption spectrometry Determination of calcium content.

This section applies to iron ore, iron ore, sinter and pellets Determination of calcium content. Measuring range (mass fraction) .0.030% ~

1.50%.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 6682 analytical laboratory water specifications and test methods

Preparation of pre-dried samples for analysis of iron ores GB/T 6730.1

GB/T 8170 repair value of about rules and limit values and judgment

GB/T 10322.1 Iron ore sampling and sample preparation methods

GB/T 12806 laboratory glassware single standard line capacity bottle

GB/T 12807 Laboratory glassware graduated pipette

GB/T 12808 laboratory glassware single standard pipette

3 principle

The sample was decomposed with hydrochloric acid-nitric acid and evaporated to dryness. The residue was treated with hydrofluoric acid, melted with sodium carbonate, and combined with the main liquid. In a certain acidity, with chlorine

Strontium as a release agent, at an atomic absorption spectrophotometer wavelength of 422.7nm, the use of air - acetylene flame, were measured.

4 reagent

Unless otherwise indicated in the analysis, the use of only approved analytical reagents and in line with GB/T 6682 provisions of distilled water or its purity phase

When water.