Portland State University. Department of Chemistry
David K. Roe
Date of Publication
Master of Science (M.S.) in Chemistry
Arsenic -- Analysis, Catechol
1 online resource (66 p.)
There is not, at this time, a simple method for the simultaneous determination of As (III) and As (V) at trace levels. The development of such as method is needed, as the toxicities of these two species differ so greatly.
As (III) and As (V) are polarographically reducible in the presence of excess catechol, but the wave produced by As (V) is depended on time, pH and catechol concentration as well as As (V) concentration. In order to understand this behavior, determination of formation constants for any complex species present were needed to identify which species is electroactive. The literature to date on the subject of As (V) – catechol compounds has shown that there is not a thorough understanding of what species are present and what their stabilities are.
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Haak, Ronald P., "An investigation of arsenic(V)-catechol complexes" (1978). Dissertations and Theses. Paper 2849.