Show simple item record

dc.contributor.authorLedder, Traceyen
dc.date.accessioned2014-03-14T21:31:57Zen
dc.date.available2014-03-14T21:31:57Zen
dc.date.issued1991-12-05en
dc.identifier.otheretd-03172010-020312en
dc.identifier.urihttp://hdl.handle.net/10919/41675en
dc.description.abstractUp-coming regulations on chlorine dioxide in drinking water treatment require low level measurement of chlorite ion (CI0₂-) and chlorate ion (CI0₃-). This research investigated analysis of CI0₂- and CI0₃-; in drinking water by flow injection analysis with iodometric detection (FIA) and ion chromatography with conductivity detection (IC). Both the FIA and IC methods were accurate for the determination of CIO₂-; and CIO₃-; in reagent water. The IC method was accurate in drinking water, however, FIA responded to chloramines and other oxidants present in drinking water causing inaccurate analysis of CIO₂-; and CIO₃-; by FIA. The two IC eluants investigated, a carbonate/bicarbonate mixture and a borate/boric acid mixture, performed well. By taking advantage of the slightly different separation abilities of each eluant, the IC method can be modified to maximize resolution of CIO₂-; and CIO₃-; in different drinking water matrices. Chlorite was unstable in chlorinated drinking water but was stable for up to three days when sodium oxalate was added and stable up to eighteen days when ethylene diamine was added as a preservative. Chlorate was stable in drinking water for up to eighteen days with or without a preservative. The propagation of errors method for determining detection limits yielded limits of detection for CIO₂- (mg/L) of 0.05 for FIA, 0.03 for the IC carbonate eluant and 0.01 for the IC borate eluant. For CIO₃- the limits of detection (mg/L) were 0.24 for FIA; 0.11 for the IC carbonate eluant and 0.02 for the borate eluant.en
dc.format.extent154 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.isformatofOCLC# 25404424en
dc.relation.haspartLD5655.V855_1991.L422.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1991.L422en
dc.subject.lcshChloratesen
dc.subject.lcshChloritesen
dc.subject.lcshDrinking water -- Analysisen
dc.subject.lcshWater -- Purification -- Chlorinationen
dc.titleComparison of ion chromatography and flow injection analysis methods for monitoring chlorite and chlorate ions in drinking wateren
dc.typeThesisen
dc.contributor.departmentEnvironmental Sciences and Engineeringen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineEnvironmental Sciences and Engineeringen
dc.type.dcmitypeTexten
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03172010-020312/en
dc.date.sdate2010-03-17en
dc.date.rdate2010-03-17en
dc.date.adate2010-03-17en


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record