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Microfluidic Analysis with Front-Face Fluorometric Detection for the Determination of Total Inorganic Iodine in Drinking Water

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dc.abstract.enA microfluidic method with front-face fluorometric detection was developed for the determination of total inorganic iodine in drinking water. A polydimethylsiloxane (PDMS) microfluidic device was employed in conjunction with the Sandell–Kolthoff reaction, in which iodide catalyzed the redox reaction between Ce(IV) and As(III). Direct alignment of an optical fiber attached to a spectrofluorometer was used as a convenient detector for remote front-face fluorometric detection. Trace inorganic iodine (IO3− and I−) present naturally in drinking water was measured by on-line conversion of iodate to iodide for determination of total inorganic iodine. On-line conversion efficiency of iodate to iodide using the microfluidic device was investigated. Excellent conversion efficiency of 93 – 103% (%RSD = 1.6 – 11%) was obtained. Inorganic iodine concentrations in drinking water samples were measured, and the results obtained were in good agreement with those obtained by an ICP-MS method. Spiked sample recoveries were in the range of 86%(±5) – 128%(±8) (n = 12). Interference of various anions and cations were investigated with tolerance limit concentrations ranging from 10−6 to 2.5 M depending on the type of ions. The developed method is simple and convenient, and it is a green method for iodine analysis, as it greatly reduces the amount of toxic reagent consumed with reagent volumes in the microfluidic scale.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorNacapricha, Duangjai
dc.contributor.authorChantiwas, Rattikan
dc.contributor.authorChoengchan, Nathawut
dc.contributor.authorJeamsaksiri, Wutthinan
dc.contributor.authorSripumkhai, Wisaroot
dc.contributor.authorInpota, Prawpan
dc.contributor.authorStrzelak, Kamil
dc.contributor.authorWilairat, Prapin
dc.contributor.authorRatanawimarnwong, Nuanlaor
dc.contributor.authorKoncki, Robert
dc.date.accessioned2024-01-25T11:28:55Z
dc.date.available2024-01-25T11:28:55Z
dc.date.issued2018
dc.description.financeNie dotyczy
dc.description.number2
dc.description.volume34
dc.identifier.doi10.2116/ANALSCI.34.161
dc.identifier.issn0910-6340
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/112422
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofAnalytical Sciences
dc.relation.pages161-167
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enMicrofluidic analysis
dc.subject.enfront-face fluorescence detection
dc.subject.entotal inorganic iodine
dc.subject.endrinking water
dc.titleMicrofluidic Analysis with Front-Face Fluorometric Detection for the Determination of Total Inorganic Iodine in Drinking Water
dc.typeJournalArticle
dspace.entity.typePublication