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Electrodialysis in flow injection systems
Thesis (PhD (Chemistry))--University of Pretoria, 2006.
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University of Pretoria
2013
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| _version_ | 1867613692178202624 |
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| access_status_str | Open Access |
| author2 | Van Staden, J.F. |
| author_browse | Van Staden, J.F. |
| author_facet | Van Staden, J.F. |
| collection | Thesis |
| dc_rights_str_mv | © 1999 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 (PhD (Chemistry))--University of Pretoria, 2006. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/30089 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:40:10.900Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| 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:2263/30089 Electrodialysis in flow injection systems Van Staden, J.F. upetd@up.ac.za Hattingh, Cornelius Johannes Chemistry Electrolyte solutions Electrodialysis Ion permeable membranes Flow injection systems UCTD Thesis (PhD (Chemistry))--University of Pretoria, 2006. Flow injection analysis (FIA) is a continuous flow technique developed in the early 1970's. FIA is based on reproducible sample injection, accurate timing and controlled dispersion. This technique is very versatile due to the control of the variables and can easily be automated. This technique is very suitable for routine laboratory analysis. By introducing various sample modifying techniques in tandem with the FIA system, samples can easily be modified. Some modifying techniques are analyte pre-concentration, sample dilution and sample cleanup. Passive dialysis can be used very successfully for sample dilution and cleanup. Problems arise when samples with low analyte concentration have to be analysed. For this reason an electrodialyser unit, equipped with a passive membrane, was developed. The history, development and theory of membranes and membrane processes are discussed. A study of the movement of ions, in solution and across a passive membrane, under the influence of an applied d.c. electrical potential is given. Passive membranes were evaluated for use in the proposed system. The following factors influencing the efficiency of electrodialysis in the F1 system were studies. The flow rate of the donor and acceptor channels; the applied d.c. electrical potential; injection loop volumes; flow direction in the electrodialyser unit. An investigation was done into on-line analyte pre-concentration and regulated dilution probabilities of the electrodialysis system. Systems that were evaluated are the following: The determination of chloride in water effluents; the determination of copper and zinc in pharmaceuticals; the direct and indirect determination of phosphate in fertilizers. A comparative study between the advantages and disadvantages of the passive dialysis and electrodialysis system is given. Chemistry unrestricted 2013-09-07T17:54:47Z 2006-12-04 2013-09-07T17:54:47Z 2000-04-01 2006-12-04 2006-12-04 Thesis Hattingh, CJ 1999, Electrodialysis in flow injection systems, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/30089 > H900/ag http://hdl.handle.net/2263/30089 http://upetd.up.ac.za/thesis/available/etd-12042006-132952/ © 1999 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 application/pdf application/pdf application/pdf application/pdf University of Pretoria |
| spellingShingle | Chemistry Electrolyte solutions Electrodialysis Ion permeable membranes Flow injection systems UCTD Electrodialysis in flow injection systems |
| title | Electrodialysis in flow injection systems |
| title_full | Electrodialysis in flow injection systems |
| title_fullStr | Electrodialysis in flow injection systems |
| title_full_unstemmed | Electrodialysis in flow injection systems |
| title_short | Electrodialysis in flow injection systems |
| title_sort | electrodialysis in flow injection systems |
| topic | Chemistry Electrolyte solutions Electrodialysis Ion permeable membranes Flow injection systems UCTD |
| url | http://hdl.handle.net/2263/30089 http://upetd.up.ac.za/thesis/available/etd-12042006-132952/ |