Atomization of synthetic and real samples using heated graphite atomizers for atomic absorption spectroscopy : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Chemistry at Massey University

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dc.contributor.authorPritchard, Mark William
dc.date.accessioned2017-08-08T02:46:28Z
dc.date.available2017-08-08T02:46:28Z
dc.date.issued1975
dc.description.abstractThe interference effects caused by a number of matrices including compounds such as NaC1, HC1, KBr, HNO3, H3PO4, H2SO4 on Cu, Pb, Cd and A1 atomic absorption signals when the elements are atomized from three non-flame graphite atomizers (furnace, cup and rod) are studied over several concentration ranges. Investigations show that most of the interferences found occur in the vapour phase. A comprehensive literature survey has been done and from this survey and the experimental work carried out, discussions are presented on the postulated mechanisms of interference. Two main theories are given for the vapour phase interference, i) entrapment of the atom in the matrix particle forming in the vapour, ii) rapid molecular condensation in the vapour phase. Several degrees of interference (both enhancement and depression) were obtained for the different chemical and atomization systems used. Attempts were made at rationalizing the degree and type of interference in terms of the postulated models. Supporting evidence for the atom entrapment theory was gained from an investigation of the nature of the non-atomic absorption peak obtained mainly when a1ka1i halides are present in the sample. Evidence is produced showing that the absorption spectra obtained from alkali halides here and by other workers are charge-transfer spectra. An investigation into the use of a graphite atomizer for zinc ana1ysis in bovine serum is presented and compared to determinations using flame atomic absorption on the same samples.en_US
dc.identifier.urihttp://hdl.handle.net/10179/11628
dc.language.isoenen_US
dc.publisherMassey Universityen_US
dc.rightsThe Authoren_US
dc.subjectAtomic absorption spectroscopyen_US
dc.titleAtomization of synthetic and real samples using heated graphite atomizers for atomic absorption spectroscopy : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Chemistry at Massey Universityen_US
dc.typeThesisen_US
massey.contributor.authorPritchard, Mark William
thesis.degree.disciplineChemistryen_US
thesis.degree.grantorMassey Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science (M. Sc.)en_US
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