Capillary Optode: Determination of Mercury(II) in Aqueous Solution
- 1 January 1999
- journal article
- research article
- Published by Taylor & Francis in Analytical Letters
- Vol. 32 (4) , 649-664
- https://doi.org/10.1080/00032719908542846
Abstract
A capillary optode for determination of mercury(II) in aqueous solution has been developed. The sensors are composed of the capillary glass tubes with a chemically sensitive coating on the inner surface, consisting of a 4-(2-thiazolylazo) resorcinol (TAR) and Nafion® composite thin film. When a sample solution is passed through a capillary tube, the mercury(II) ions forms complexes with the immobilised TAR resulting in a change of the colour of the inner surface of the capillary which, in turn, can be monitored spectrophotometrically. The characteristics of these sensors including effect of flow-rate and pH, reproducibility, sensitivity, linear range, life time and selectivity are discussed.Keywords
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