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Dissertation/Thesis Abstract

Ion transfer stripping voltammetry method using conductive polymer to low concentration detection of environmental contaminants
by Ranawaka Arachchige, Dinusha, M.S., Arkansas State University, 2016, 48; 10095768
Abstract (Summary)

Detecting environmental contaminants such as Selective serotonin reuptake inhibitors (SSRIs) and Cr (VI) compounds is essential since they are highly toxic contaminants of many drinking water supplies leading to adverse health effects. Selective serotonin reuptake inhibitors are common antidepressants therapeutics and fluoxetine; Prozac®, citalopram; Celexa ® and sertraline; Zoloft® were successfully detected in this study. Ion transfer stripping voltammetry (ITSV) was applied to detect those as cations at nanomolar concentrations using an inexpensive and disposable pencil lead electrode, with a lower detection limit of 30 nM. The pencil lead electrode was modified using the conducting polymer Poly (3, 4-ethylenedioxythiophene) (PEDOT-C14) and PVC (poly-vinyl chloride) membrane. The PVC/PEDOT-C14 -modified electrode demonstrated a linear current response from 100 to 1000 nM for these therapeutics. Ion transfers of Hydrogen chromate as anions were studied using a double-polymer modified glassy carbon electrode using the conducting polymer poly (3-octylthiophene) (POT), and PVC membrane. Lipophilicity of Hydrogen chromate ions were evaluated comparing to other common inorganic contaminants. Exhaustive stripping of Hydrogen chromate ions in cyclic voltammetry and their relative high lipophilicity infer that ITSV can be successfully applied to detect them in future studies.

Indexing (document details)
Advisor: Izadyar, Anahita
Commitee: Draganjac, Mark, Koizumi, Hideya
School: Arkansas State University
Department: Chemistry
School Location: United States -- Arkansas
Source: MAI 55/04M(E), Masters Abstracts International
Subjects: Analytical chemistry, Environmental science
Keywords: Celexa, Citalopram, Conductive polymer, Environmental contaminants, Fluoxetine, Hydrogen chromate, Ion transfer stripping voltammetry, Prozac, Selective serotonin reuptake inhibitors, Sertraline, Zoloft
Publication Number: 10095768
ISBN: 978-1-339-59966-3
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