Date of Award
1-30-2017
Document Type
Thesis
Degree Name
Chemistry, MS
First Advisor
Anahita Izadyar
Committee Members
Hideya Koizumi; John Hershberger
Call Number
LD251 .A566t 2016 A39
Abstract
Toxic chemicals like chromium (VI) pose a great risk to humans and environment. In this study, we used ion-selective electrode like glassy carbon (GC) to detect trace analysis of chromium in the form of hydrogen chromate ion (HCrO4-) in drinking water. The surfaces of GC electrodes were electrochemically modified by polymerizing with poly 3-octylthiophene (POT) using cyclic voltammetry followed by plasticized polyvinyl chloride (PVC) to form a double polymer membrane. They were then used in the stripping voltammetry technique whereby current showed a linear response of hydrogen chromate ion between 30 nM to 1300 nM in drinking water. Graphene is a 2D structure with unique electronic, optical, mechanical and electrochemical properties. Compared to regular electrodes, graphene electrodeposited electrodes have several advantages, such as a higher surface area, which improve electron transfer rate, increase mass-transport rate, and higher signal-to-noise ratio. They play an important role in the detection of analytical samples.
Rights Management
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Al-Amoody, Fatma Ali, "Application Of Electrochemical Sensors for Nanomolar Detection of Chromium (Vi) In Drinking Water and Development of Graphene Based Ionophore-Doped Polymeric Membrane Electrode" (2017). Student Theses and Dissertations. 613.
https://arch.astate.edu/all-etd/613
