Flow-injection analysis of the platinum-group metals

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dc.contributor.advisorKoch, Klaus Ren_ZA
dc.contributor.authorAuer, Dereken_ZA
dc.date.accessioned2016-03-04T16:52:41Z
dc.date.available2016-03-04T16:52:41Z
dc.date.issued1995en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractTo date the principle methods for the determination of the platinum-group metals (PGMs) use an "off-line" assay with flame-atomic absorption spectrometry and visible spectrometry. Both suffer numerous interferences and involve time-consuming and arduous laboratory separation methods prior to analysis. An "on-line" method for the rapid assay of the PGMs is indeed a lacking component in the analysts' repertoire of methods. This study describes the development of spectrophotometric methods for the determination of the PGMs using flow-injection analysis (FIA). The principle of exploiting the remarkably specific and selective reaction of stannous halides with the PGMs to yield a series of intensely coloured complexes in acidic solutions forms the basis of these methods. The reaction is subject to relatively few interferences from other transition metals. A high speed scanning spectrophotometer is employed to obtain second order data. The successful manipulation of the data enables the determination of PGMs as single components and also simultaneously in mixtures. Attention is focused on the establishment of principles for successful multi-component analysis of PGMs. The development of a software program for multi-wavelength data manipulation was mandatory and is described. Criteria for successful selection of analytical wavelengths are discussed. The usefulness of multi-dimensional graphical data representation is demonstrated in a stop-flow study of the palladium reaction with tin (II) chloride. Qualitative information is provided regarding the nature of complexes and their interactions. Correlation of spectrophotometric data with complex solution colour changes is made. The requirements for future progress in multi-component FIA determinations as well as the direction for future research conclude the study.en_ZA
dc.identifier.apacitationAuer, D. (1995). <i>Flow-injection analysis of the platinum-group metals</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/17511en_ZA
dc.identifier.chicagocitationAuer, Derek. <i>"Flow-injection analysis of the platinum-group metals."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1995. http://hdl.handle.net/11427/17511en_ZA
dc.identifier.citationAuer, D. 1995. Flow-injection analysis of the platinum-group metals. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Auer, Derek AB - To date the principle methods for the determination of the platinum-group metals (PGMs) use an "off-line" assay with flame-atomic absorption spectrometry and visible spectrometry. Both suffer numerous interferences and involve time-consuming and arduous laboratory separation methods prior to analysis. An "on-line" method for the rapid assay of the PGMs is indeed a lacking component in the analysts' repertoire of methods. This study describes the development of spectrophotometric methods for the determination of the PGMs using flow-injection analysis (FIA). The principle of exploiting the remarkably specific and selective reaction of stannous halides with the PGMs to yield a series of intensely coloured complexes in acidic solutions forms the basis of these methods. The reaction is subject to relatively few interferences from other transition metals. A high speed scanning spectrophotometer is employed to obtain second order data. The successful manipulation of the data enables the determination of PGMs as single components and also simultaneously in mixtures. Attention is focused on the establishment of principles for successful multi-component analysis of PGMs. The development of a software program for multi-wavelength data manipulation was mandatory and is described. Criteria for successful selection of analytical wavelengths are discussed. The usefulness of multi-dimensional graphical data representation is demonstrated in a stop-flow study of the palladium reaction with tin (II) chloride. Qualitative information is provided regarding the nature of complexes and their interactions. Correlation of spectrophotometric data with complex solution colour changes is made. The requirements for future progress in multi-component FIA determinations as well as the direction for future research conclude the study. DA - 1995 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1995 T1 - Flow-injection analysis of the platinum-group metals TI - Flow-injection analysis of the platinum-group metals UR - http://hdl.handle.net/11427/17511 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17511
dc.identifier.vancouvercitationAuer D. Flow-injection analysis of the platinum-group metals. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1995 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17511en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemistryen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemistryen_ZA
dc.subject.otherMinerals Scienceen_ZA
dc.titleFlow-injection analysis of the platinum-group metalsen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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