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ucin1180714534.pdf (2.66 MB)
ETD Abstract Container
Abstract Header
Elemental Speciation Analysis of Arsenic, Selenium and Phosphorus: Exploring Foods and Plants
Author Info
Kubachka, Kevin M.
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1180714534
Abstract Details
Year and Degree
2007, PhD, University of Cincinnati, Arts and Sciences : Chemistry.
Abstract
Due to varying properties of an element, depending on its chemical form, total element concentration is often not sufficient information for accurate assessment. Therefore, the analysis of the distribution of an element amongst various chemical species (termed speciation) is critical. By implemented combinations of various separation techniques (namely high performance liquid chromatography (HPLC) and gas chromatography (GC)) with mass spectrometric techniques such as inductively coupled plasma mass spectrometry (ICP-MS) and molecular mass spectrometry techniques, a powerful speciation tool is created. Elemental analysis using ICP-MS and speciation analysis can be used in complement to confirm species recovery and mass balance. When speciation information using HPLC/GC-ICP-MS does not provide enough information, molecular mass spectrometry techniques with softer ionization techniques (able to preserve structural characteristics) can enable confident identification of a given species. Arsenic, selenium, and phosphorus are extremely important elements and are much concern in several fields of research. In specific, arsenic and selenium are of interest due to the drastic difference in toxicity among their respective species. The main goal of this dissertation is to examine the distribution of arsenic, selenium, and phosphorus among various species for assessment of toxicity, nutritional value, and environmental impact. Wheat, potato, yam, and rice samples were examined to establish the impact of their consumption in regards to arsenic content. Selenium association with proteins was examined to further understand its biotransformation in mushrooms. The metabolism of selenium in genetically modified Brassica juncea was examined to further understand the selenium flow of the plant in hopes of creating a more efficient phytoremediation tool. Organophosphorus chemical warfare agent degradation products were chromatographically separated from inorganic phosphate (a common interference) in several food samples using a combination of HPLC-ICP-MS and HPLC-ESI-MS in an effect to detect food contamination.
Committee
Dr. Joseph Caruso (Advisor)
Pages
127 p.
Subject Headings
Chemistry, Analytical
Keywords
selenium
;
phosphorus
;
arsenic
;
speciation
;
ICP-MS
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Citations
Kubachka, K. M. (2007).
Elemental Speciation Analysis of Arsenic, Selenium and Phosphorus: Exploring Foods and Plants
[Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1180714534
APA Style (7th edition)
Kubachka, Kevin.
Elemental Speciation Analysis of Arsenic, Selenium and Phosphorus: Exploring Foods and Plants.
2007. University of Cincinnati, Doctoral dissertation.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1180714534.
MLA Style (8th edition)
Kubachka, Kevin. "Elemental Speciation Analysis of Arsenic, Selenium and Phosphorus: Exploring Foods and Plants." Doctoral dissertation, University of Cincinnati, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1180714534
Chicago Manual of Style (17th edition)
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Document number:
ucin1180714534
Download Count:
1,915
Copyright Info
© 2007, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.