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Bodamp-gaschromatografie met die dinamiese oplosmiddeleffekinlaat : toepassing in die chemotaksonomie van Acacia
Thesis (MSc (Chemisty))--University of Pretoria, 1990.
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University of Pretoria
2024
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| _version_ | 1867613609234792448 |
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| access_status_str | Open Access |
| author2 | Rohwer, Egmont Richard |
| author_browse | Rohwer, Egmont Richard |
| author_facet | Rohwer, Egmont Richard |
| collection | Thesis |
| dc_rights_str_mv | © 2024 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Thesis (MSc (Chemisty))--University of Pretoria, 1990. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/99558 |
| institution | University of Pretoria (South Africa) |
| language | Af |
| last_indexed | 2026-06-10T12:38:52.072Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/99558 Bodamp-gaschromatografie met die dinamiese oplosmiddeleffekinlaat : toepassing in die chemotaksonomie van Acacia Rohwer, Egmont Richard Robbertse, P.J. (Petrus Johannes), 1932- Erasmus, Maria Elizabeth Catharina Bodamp-gaschromatografie Oplosmiddeleffekinlaat Chemotaksonomie Acacia UCTD Thesis (MSc (Chemisty))--University of Pretoria, 1990. In the light of the controversy surrounding the classification of some Acacia species, an analytical method was investigated for the chemotaxonomic classification of these species by means of their unique flower fragrances. The dynamic solvent effect (DSE ) was used as a concentrating and inlet technique for gas chromatography. The DSE is a new, high-precision technique developed at the Institute for Chromatography. Concentration occurs by accumulation of volatile compounds on a porous bed of sintered glass in an evaporating solvent film. To determine the applicability of the technique, tests were initially performed on three Acacia species of uncontroversial classification. Encouraging results led to a further 18 Acacia species being studied from a specific geographical area in South Africa. The gas chromatographic data was statistically treated by a standard computer programme that performed canonical discriminant analysis. Two dimensional scatter plots were obtained which clearly mark the position of the species in relation to one another. In this way, each investigated species could be uniquely correlated to a flower fragrance profile. The results constitute the first successful application of headspace gas chromatography in chemotaxonomy. The success is directly ascribed to the excellent inlet technique that allows highly reproducible analysis of compounds in the 1 - 100 parts per billion (109 ) concentration range. Chemisty MSc (Chemisty) 2024-11-27T09:16:14Z 2024-11-27T09:16:14Z 22/01/31 1990 Thesis http://hdl.handle.net/2263/99558 Af © 2024 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Bodamp-gaschromatografie Oplosmiddeleffekinlaat Chemotaksonomie Acacia UCTD Bodamp-gaschromatografie met die dinamiese oplosmiddeleffekinlaat : toepassing in die chemotaksonomie van Acacia |
| title | Bodamp-gaschromatografie met die dinamiese oplosmiddeleffekinlaat : toepassing in die chemotaksonomie van Acacia |
| title_full | Bodamp-gaschromatografie met die dinamiese oplosmiddeleffekinlaat : toepassing in die chemotaksonomie van Acacia |
| title_fullStr | Bodamp-gaschromatografie met die dinamiese oplosmiddeleffekinlaat : toepassing in die chemotaksonomie van Acacia |
| title_full_unstemmed | Bodamp-gaschromatografie met die dinamiese oplosmiddeleffekinlaat : toepassing in die chemotaksonomie van Acacia |
| title_short | Bodamp-gaschromatografie met die dinamiese oplosmiddeleffekinlaat : toepassing in die chemotaksonomie van Acacia |
| title_sort | bodamp gaschromatografie met die dinamiese oplosmiddeleffekinlaat toepassing in die chemotaksonomie van acacia |
| topic | Bodamp-gaschromatografie Oplosmiddeleffekinlaat Chemotaksonomie Acacia UCTD |
| url | http://hdl.handle.net/2263/99558 |