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New Avenues in Electrochemical Systems and Analysis

Rusinek, Cory A
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1490350904669695

Abstract Details

2017, PhD, University of Cincinnati, Arts and Sciences: Chemistry.
The objective of this research focused on the trace detection of various analytes using electroanalytical chemistry. For chapters 1 and 2, a collaboration between the Heineman research group in the UC Department of Chemistry, the Papautsky research group in the UC Department of Electrical Engineering, and the Bange research group in the Xavier University Department of Chemistry was established to develop electrochemical methods for the detection of heavy metal ions. For chapter 3, another collaboration was developed between the Heineman group and Fraunhofer USA, Inc. Center for Coatings and Diamond Technologies (Fraunhofer CCD) in East Lansing, Michigan to develop a boron-doped diamond (BDD) optically transparent electrode (OTE). In chapter 1, the first report of cloud point extraction (CPE) with electrochemical detection was completed. CPE is was used to both selectively remove interferences while pre-concentrating the metal ions in the extracted-phase. Of main focus in this chapter were toxic heavy metal ions cadmium (Cd) and lead (Pb) where they were found to form neutral, extractable complexes with iodide and dithizone, respectively. The reported detection limits using anodic stripping voltammetry (ASV) are at or below other common analysis methods such as flame and graphite furnace atomic absorption spectroscopy (F-AAS and GF-AAS). Practical application to complex samples using both metal ions and chelating agents was studied using environmental water samples and the results were in general agreement with F-AAS and GF-AAS. Chapter 2 focused on the development of a better, more sensitive method to determine manganese (Mn) in environmental and biological water samples using Indium Tin Oxide (ITO) working electrodes. It was the first report using ITO as the working electrode for cathodic stripping voltammetric (CSV) analyses and similar to chapter 1, the method achieved sensitivities and limits of detection equal to or better than competing analysis methods. To that point, in acid-digested bovine blood, the Mn concentrations found with CSV-ITO agreed closely to that found using inductively coupled plasma mass spectrometry (ICP-MS) and GF-AAS. BDD is a novel electrode that is noted for its ruggedness for sensitive electroanalytical measurements. Its applicability in spectroelectrochemical measurements was investigated in Chapter 3. BDD OTEs fabricated on quartz glass were provided by Fraunhofer CCD and a variety of both spectroscopic and electrochemical properties were evaluated. Being such a rugged material, the BDD OTEs were also investigated as an indirect spectroelectrochemical sensor for a common polycyclic aromatic hydrocarbon (PAH), 1-hydroxypyrene (1-pyOH); a detection limit of 80 nM was achieved. Overall, this dissertation focused on the improvement of analytical methods and investigation of electrode materials in new applications. Sensitivities, limits of detection, and accuracy observed throughout this research is competitive or better than that reported in literature using similar methodologies.
William Heineman, Ph.D. (Committee Chair)
Ian Papautsky, Ph.D. (Committee Member)
Thomas Ridgway, Ph.D. (Committee Member)
George Stan, Ph.D. (Committee Member)
141 p.
Chemistry
electrochemistry; stripping voltammetry; spectroelectrochemistry; cloud point extraction; boron-doped diamond; indium tin oxide

Recommended Citations

Citations

  • Rusinek, C. A. (2017). New Avenues in Electrochemical Systems and Analysis [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1490350904669695

    APA Style (7th edition)

  • Rusinek, Cory. New Avenues in Electrochemical Systems and Analysis. 2017. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1490350904669695.

    MLA Style (8th edition)

  • Rusinek, Cory. "New Avenues in Electrochemical Systems and Analysis." Doctoral dissertation, University of Cincinnati, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1490350904669695

    Chicago Manual of Style (17th edition)

ucin1490350904669695
319
© 2017, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.