GB/T 6730.67-2009Iron ores - Determination of arsenic content - Hydride generation atomic absorption spectrometric method (English PDF)

1 Scope

GB/T 6730 This section provides by hydride generation - Determination of arsenic content in iron ore by atomic absorption spectrometry methods.

This section applies to natural iron ore, iron ore and agglomeration, including the determination of arsenic content in the sintered product. Measurement range (mass fraction).

0.00005% to 0.1%.

2 Normative references

The following documents contain provisions which, through reference to GB/T 6730 to the present, constitute provisions of this section. For dated references,

All subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encourage an agreement in accordance with this standard

Parties to study the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)

GB/T 6730.1 Methods for chemical analysis of iron pre-dried sample was prepared using (GB/T 6730.1-1986, idt ISO 7764.1998)

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

GB/T 10322.1 iron ore sampling and sample preparation method (GB/T 10322.1-2000, idt ISO 3082.1998)

GB/T 12806 Laboratory glassware single marking flask (GB/T 12806-1991, neq ISO 1042. 1983)

GB/T 12808 standard laboratory glassware single line pipette (GB/T 12808-1991, neq ISO 648. 1977)

Principle 3

Sample was dissolved in nitric acid and hydrochloric acid, evaporated to dryness and dissolved in dilute hydrochloric acid, sodium carbonate and sodium peroxide residue alkali fusion process, the use of the test solution

Potassium iodide pre reductant, ascorbic acid do masking agent, acidity regulator and appropriately diluted, reduction with sodium borohydride, by hydride generator

Arsine, with the carrier gas into the quartz tube atomizer, the determination of arsenic content at a wavelength of 193.7nm.

4 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical reagents.