GB/T 6730.39-2017Iron ores—Determination of nickle content—Dimetylglyoxime spectrophotometric method (English PDF)

1 Scope

GB/T 6730 provisions of this part of dimethylglyoxime spectrophotometric determination of nickel content.

This section applies to iron ore, iron ore, sinter and pellets Determination of nickel content. Measurement range (mass fraction).

0.0050% ~ 0.10%.

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 rounded repair rules and limit values of the representation 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

At pH 8-9, nickel forms a complex with dimethylglyoxime and is extracted with chloroform. In ammonium hydroxide medium, ammonium persulfate is used as oxygen

Agents, nickel and dimethylglyoxime to form a stable wine red complex. At a wavelength of 460 nm, its absorbance was measured, whereby the amount of nickel was measured.

4 Reagents and materials

Unless otherwise indicated in the analysis, the use of only approved analytical reagent and in line with GB/T 6682 more than two distilled water or purity

Quite water.