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Optimizing pretreatment for the detection of phosphorus oxyanions using ion chromatography

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Date Issued:
2006
Summary:
Phosphorus (P) is required for all living organisms. Fully oxidized pentavalent (+V) is the principal form in organisms, however studies on Desulfotignum phosphitoxidans show the enzymatic metabolism of reduced P oxyanions. Thus a natural source of reduced P is expected. Geothermal waters are naturally occurring reducing environments and ion chromatography has been used for the detection of submicromolar concentrations of P, yet the detection of reduced oxyanions is complicated by fluoride and hydrogen carbonate with similar elution times as hypophosphite(+I) and phosphite(+III) respectively. Studies had shown that simplifying the matrix through pretreatment with silver and sulfonic acid cartridges improves IC limits of detection (LODs). The effects of pretreatment are dependant upon the total concentration of ions in solution. The purpose of this study is to determine IC phosphorous oxyanion LODs and to maximize signals by analyzing the relationship between filtering techniques, effective concentration of P oxyanions, and total ions in the matrix.
Title: Optimizing pretreatment for the detection of phosphorus oxyanions using ion chromatography.
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Name(s): Sempertegui Plaza, Tito S.
Harriet L. Wilkes Honors College
Type of Resource: text
Genre: Thesis
Issuance: multipart monograph
Date Issued: 2006
Publisher: Florida Atlantic University
Physical Form: electronic
electronic resource
Extent: vii, 30 leaves : ill.
Language(s): English
Summary: Phosphorus (P) is required for all living organisms. Fully oxidized pentavalent (+V) is the principal form in organisms, however studies on Desulfotignum phosphitoxidans show the enzymatic metabolism of reduced P oxyanions. Thus a natural source of reduced P is expected. Geothermal waters are naturally occurring reducing environments and ion chromatography has been used for the detection of submicromolar concentrations of P, yet the detection of reduced oxyanions is complicated by fluoride and hydrogen carbonate with similar elution times as hypophosphite(+I) and phosphite(+III) respectively. Studies had shown that simplifying the matrix through pretreatment with silver and sulfonic acid cartridges improves IC limits of detection (LODs). The effects of pretreatment are dependant upon the total concentration of ions in solution. The purpose of this study is to determine IC phosphorous oxyanion LODs and to maximize signals by analyzing the relationship between filtering techniques, effective concentration of P oxyanions, and total ions in the matrix.
Identifier: 315826182 (oclc), 11581 (digitool), FADT11581 (IID), fau:1315 (fedora)
Note(s): by Tito S. Sempâertegui.
Typescript (Photocopy).
Thesis (B.A.)--Florida Atlantic University, Honors College, 2006.
Bibliography: leaves 29-30.
Electronic reproduction. Boca Raton, Fla., 2006. Mode of access: World Wide Web.
Subject(s): Water -- Analysis
Arsenic compounds -- Analysis
Selenium compounds
Trace analysis
Held by: FBoU FAUER
Persistent Link to This Record: http://purl.flvc.org/FAU/11581
Use and Reproduction: Copyright © is held by the author, with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
Host Institution: FAU

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