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Direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry
Bibliography: pages 119-126.
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| Format: | Thesis |
| Language: | English |
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Department of Chemistry
2016
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| _version_ | 1867613245891674112 |
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| access_status_str | Open Access |
| author | Haraldsen, Lana Celeste |
| author2 | Pougnet, M A Bruno |
| author_browse | Haraldsen, Lana Celeste Pougnet, M A Bruno |
| author_facet | Pougnet, M A Bruno Haraldsen, Lana Celeste |
| author_sort | Haraldsen, Lana Celeste |
| collection | Thesis |
| description | Bibliography: pages 119-126. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/17285 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:05.164Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Chemistry |
| publisherStr | Department of Chemistry |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/17285 Direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry Haraldsen, Lana Celeste Pougnet, M A Bruno Chemistry Fly ash - Analysis Coal ash - Analysis Bibliography: pages 119-126. Graphite Furnace Atomic Absorption Spectrometry (GFAAS) was used for the determination of cadmium and beryllium in coal and fly ash slurries. Sample preparation involved grinding the sample to a fine powder and slurrying it in a suitable solvent. Stable slurries were maintained by magnetic stirring during sampling. Pyrolytically coated graphite tubes were used for cadmium determinations, while beryllium was determined with platform atomisation. Ammonium dihydrogen orthophosphate and magnesium nitrate matrix modifiers were used for cadmium and beryllium determinations respectively. Calibration graphs constructed with aqueous standards containing the appropriate matrix modifier were rectilinear to at least 100 pg cadmium and 45 pg beryllium. Results were calculated with integrated peak area measurements. The detection limits were 2.9 pg for cadmium and 0.7pg for beryllium. Beryllium determinations were performed with semi-automatic sample introduction. The novel semi-automatic sampling unit utilised magnetic stirring for· the maintenance of stable slurries and operated with the standard Perkin-Elmer AS-40 autosampler. The principles of this unit were extended to the development of a fully automatic auto-sampling unit. The design and operation of both units are described. The accuracy of the methods was evaluated by analysing standard reference materials and in some cases, comparisons with acid digestion procedures. Data are presented for the analysis of South African coal and fly ash samples. The slurry methods had acceptable accuracy and precision. In comparison with the conventional acid digestion procedures using high pressure bombs, a time-saving advantage was realised. 2016-02-26T07:20:52Z 2016-02-26T07:20:52Z 1990 Master Thesis Masters MSc http://hdl.handle.net/11427/17285 eng application/pdf Department of Chemistry Faculty of Science University of Cape Town |
| spellingShingle | Chemistry Fly ash - Analysis Coal ash - Analysis Haraldsen, Lana Celeste Direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry |
| thesis_degree_str | Master's |
| title | Direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry |
| title_full | Direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry |
| title_fullStr | Direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry |
| title_full_unstemmed | Direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry |
| title_short | Direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry |
| title_sort | direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry |
| topic | Chemistry Fly ash - Analysis Coal ash - Analysis |
| url | http://hdl.handle.net/11427/17285 |
| work_keys_str_mv | AT haraldsenlanaceleste directdeterminationofcadmiumandberylliumincoalandflyashslurriesusinggraphitefurnaceatomicabsorptionspectrometry |