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Direct colorimetric detection of copper(II) ions in sampling using diffusive gradients in thin-films
Citation
McGifford, RW and Seen, AJ and Haddad, PR, Direct colorimetric detection of copper(II) ions in sampling using diffusive gradients in thin-films, Analytica Chimica Acta, 662, (1) pp. 44-50. ISSN 0003-2670 (2010) [Refereed Article]
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DOI: doi:10.1016/j.aca.2009.12.041
Abstract
A novel binding phase was developed for use in diffusive gradients in thin-film (DGT) sampling for Cu(II) by employing methylthymol blue as a chelating and chromogenic agent. Methylthymol blue was adsorbed onto beads of Dowex 1 × 8 resin (200–400 mesh) and the resin beads were then immobilised onto an adhesive disc. Analysis of exposed binding discs by either UV–vis spectrophotometry or computer imaging densitometry provided robust quantification of adsorbed Cu(II) in the 0.2–1 μg cm−2 range, allowing detection at μg L−1 concentrations in the test solution (ca. 17 μg L−1 for a 24 h deployment), and in good agreement with established DGT theory. The method was shown to be a potential replacement for binding phases based on Chelex 100 where a colorimetric response to a specific metal is desired.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Passive sampling; Binding phase; Colorimetry; Computer imaging densitometry; Copper; Methylthymol blue |
| Research Division: | Chemical Sciences |
| Research Group: | Analytical chemistry |
| Research Field: | Separation science |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in the chemical sciences |
| UTAS Author: | McGifford, RW (Mr Russell McGifford) |
| UTAS Author: | Seen, AJ (Associate Professor Andrew Seen) |
| UTAS Author: | Haddad, PR (Professor Paul Haddad) |
| ID Code: | 63144 |
| Year Published: | 2010 |
| Web of Science® Times Cited: | 12 |
| Deposited By: | Austn Centre for Research in Separation Science |
| Deposited On: | 2010-04-15 |
| Last Modified: | 2011-05-04 |
| Downloads: | 0 |
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