Abstract

Sets out a method for the determination by atomic absorption spectrometry of the concentrations of the acid-extractable ions sodium, magnesium, calcium and iron in coal.

AS 2434.9—2000
Methods for the analysis and testing of lower rank coal and its chars
Method 9: Determination of four acid-extractable inorganic ions in lower rank coal

RECONFIRMATION NOTICE
Technical Committee MN-001 has reviewed the content of this publication and in accordance with Standards Australia procedures for reconfirmation, it has been determined that the publication is still valid and does not require change.
Certain documents referenced in the publication may have been amended since the original date of publication. Users are advised to ensure that they are using the latest versions of such documents as appropriate, unless advised otherwise in this Reconfirmation Notice.
Approved for reconfirmation in accordance with Standards Australia procedures for reconfirmation on 15 July 2013.
The following are represented on Technical Committee MN-001:

Australasian Institute of Mining and Metallurgy
Australian Coal Association
Australian Coal Industry Reference Samples
Australian Coal Preparation Society
Bureau of Steel Manufacturers of Australia
Coalfield Geology Council of NSW
CSIRO Energy Technology
National Association of Testing Authorities Australia
National Generators Forum
The University of New South Wales
The University of Queensland
University of Newcastle


To view or download a copy of the reconfirmation notice please go to the reconfirmation link near the top of this page.

Scope

This Standard sets out a method for the determination by atomic absorption spectrometry of the concentrations of the acid-extractable ions sodium, magnesium, calcium and iron in coal. The method is applicable to any coal, but a meaningful interpretation of results can only be gained if the forms of the inorganics in the coal are known.
NOTES:
1 The determination of acid-extractable aluminium is also possible by this method. Aluminium is found in most coals in various forms of clays, but can also be present in some coals in an acid-extractable form, thought to be best represented as Al(OH)n(3-n)+. Aluminium in some clay types is partially soluble in acid. A detailed understanding of the mineral and inorganic constituents of the coal is necessary before acid-extractable aluminium determinations are performed.
These considerations apply also to the other inorganic ions, but to a lesser extent.
2 An alternative procedure for measurement of the concentrations of the ions using inductively coupled plasma atomic emission spectrometry (ICP-AES) is acceptable if it can be demonstrated that the procedure has the same precision and accuracy as the atomic absorption technique used in this method.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Reconfirmed 12-08-2013
Pages
ISBN
Committee	MN-001
Supersedes	DR 00078 CP AS 2434.9-1991