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Novel preconcentration techniques for the determination of trace metal ions in environmental matrices

Ryan, Eva (1993) Novel preconcentration techniques for the determination of trace metal ions in environmental matrices. PhD thesis, Dublin City University.

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The analysis of single or multiple metal ions in trace amounts in environmental matrices is a general problem. As a result methods for the selective preconcentration of trace metals are continually investigated. Successful development and application of four novel preconcentration techniques for the determination of trace metal ions are described in the bulk of this thesis. In chapter 1 traditional and novel preconcentration approaches including their inherent advantages and disadvantages are described. column switching RPHPLC technique coupled with UV/VIS detection for trace level determination of Cu(II), Fe(III) and Al(III) in waste water and beer samples is described in chapter 2. Metal precomplexation with 8-hydroxyquinoline enabled spectrophotometric detection at 400 nm. Limits of detection of 5 ppb for Al(III) and 40 ppb for Cu(II) and Fe(III) were obtained. The use of ligand coated stationary phases incorporating a novel CTAB/DTC ion pair for copper determination in mine waste water is described in chapter 3. The CTAB-DTC precolumn has been used for on-site sample loading. Direct incorporation of the loaded precolumn back into the switching system decreased overall sample analysis time considerably. Precolumn preparation was extremely reproducible with < 3 % variation for a batch size of 50. Preconcentration of Cu(II) using microbial biomass is described in chapter 4. Off-line copper determination using FAAS and on-line determination using HPLC coupled to a UV/VIS spectrophotometer was possible using this novel stationary phase. Rhizopus arrhizus (unlyophilized) packing material, particle size < 25 fjm exhibited the highest overall % recovery of Cu(II), > 90 % recovery was achieved. Surfactant enhanced adsorptive stripping voltammetry for trace level determination of aluminium in water and soil samples is reported in chapter 5. This electroanalytical preconcentration method allowed the determination of aluminium as its Solochrome Violet RS (SVRS) complex in the presence of a cationic surfactant, CTAB.

Item Type:Thesis (PhD)
Date of Award:1993
Supervisor(s):Meaney, Mary
Uncontrolled Keywords:Trace metals (Detection); Pre-concentration techniques
Subjects:Physical Sciences > Analytical chemistry
Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 License. View License
ID Code:19330
Deposited On:23 Sep 2013 14:27 by Celine Campbell. Last Modified 23 Sep 2013 14:27

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