Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/7400

Title: Aspects of indirect atomic-absorption determinations based on molybdenum heteropoly acid chemistry
Authors: Sarkissian, Lala L.
Issue Date: 1984
Publisher: © Lala Leon Sarkissian
Abstract: Molybdenum heteropoly acid chemistry with its inherent amplification factor has been used to improve the sensitivities and detection limits of methods for phosphorus and germanium determination, using both flame and electrothermal atomization atomic absorption spectrometry to determine the molybdenum. Phosphorus extracted as 12-molybdophosphoric acid, was used as a model element for the study of certain aspects of the procedure. Solvent extraction was used for the separation of the heteropoly species from the considerable excess of molybdate (added to drive the reactions to completion), which usually produces high blank values in both flame and electrothermal atomization work. A considerable improvement in blank levels, to below the instrumental detection limits has been achieved by careful drying of the extract. In addition to the chemistry of formation and extraction, the flame atomization of molybdenum has been investigated with view of improving sensitivity and detection limit. Modifications to the flame gas composition by the addition e.g. possible additional reducing agents, have been investigated. Variation of the particle microenvironment in the flame by varying the salt composition of the solution was also studied. Improvement in the nebulization process by combining flow injection sample introduction with modification of the solution physical properties was investigated.
Description: Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.
URI: https://dspace.lboro.ac.uk/2134/7400
Appears in Collections:PhD Theses (Chemistry)

Files associated with this item:

File Description SizeFormat
Thesis-1984-Sarkissian.pdf9.71 MBAdobe PDFView/Open
Form-1984-Sarkissian.pdf42.54 kBAdobe PDFView/Open


SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.