Journal
ANALYTICA CHIMICA ACTA
Volume 661, Issue 1, Pages 91-96Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2009.11.062
Keywords
Photoelectrochemical detection; Inorganic mercury; Chemosensor; Polyaniline; Rhodamine 6G
Categories
Funding
- University of Stellenbosch
- Council for Scientific and Industrial Research
- ESKOM, Electricity Supply Commission
Ask authors/readers for more resources
An analytical method using an optical probe in a photoelectrochemical cell for the sensitive and selective determination of aqueous Hg2+ is presented. A previously synthesized Hg2+ selective chemosensor, proven to be Hg2+ sensitive up to 2 mu g L-1, has been immobilized onto indium tin oxide (ITO) electrodes in a composite form with polyaniline. The coated ITO electrode was placed in a photoelectrochemical cell under closed circuit conditions in which the optical recognition of the chemosensor was converted to a measurable signal. A composite of the fluorescent chemosensor, Rhodamine 6G derivative (RS), and polyaniline (PANI) was immobilized on ITO glass plates and subjected to photovoltage measurements in the absence and presence of Hg2+. The optical responses of the coated electrode were used to determine the sensitivity and selectivity of the immobilized sensor to Hg2+ in the presence of background ions. The optical response of the PANI-dye coated electrode increased linearly with increasing Hg2+ concentration in the range 10-150 mu g L-1, with a detection limit of 6 mu g L-1. (C) 2009 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available