Microfluidic Analysis with Front-Face Fluorometric Detection for the Determination of Total Inorganic Iodine in Drinking Water
PBN-AR
Instytucja
Wydział Chemii (Uniwersytet Warszawski)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
ANALYTICAL SCIENCES (20pkt w roku publikacji)
ISSN
0910-6340
EISSN
Wydawca
JAPAN SOC ANALYTICAL CHEMISTRY
DOI
URL
Rok publikacji
2018
Numer zeszytu
2
Strony od-do
161-167
Numer tomu
34
Link do pełnego tekstu
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Słowa kluczowe
en
Microfluidic analysis
front-face fluorescence detection
total inorganic iodine
drinking water
Streszczenia
Język
en
Treść
A 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.
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Original article
Original article presents the results of original research or experiment.
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Inne
System-identifier
PX-5c51a744d5de62f432862e9a
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