Please use this identifier to cite or link to this item: http://ir.swu.ac.th/jspui/handle/123456789/12938
Title: Microfluidic analysis with front-face fluorometric detection for the determination of total inorganic iodine in drinking water
Authors: Inpota P.
Strzelak K.
Koncki R.
Sripumkhai W.
Jeamsaksiri W.
Ratanawimarnwong N.
Wilairat P.
Choengchan N.
Chantiwas R.
Nacapricha D.
Keywords: Cerium compounds
Conversion efficiency
Efficiency
Face recognition
Fluidic devices
Iodine
Iodine compounds
Optical fibers
Polydimethylsiloxane
Positive ions
Potable water
Redox reactions
Silicones
Drinking water samples
Fluorescence detection
Fluorometric detection
Inorganic iodine
Micro-fluidic devices
Microfluidic analysis
Polydimethylsiloxane PDMS
Spectrofluorometers
Microfluidics
baysilon
dimeticone
drinking water
iodate
iodine
chemistry
fluorometry
lab on a chip
limit of detection
procedures
Dimethylpolysiloxanes
Drinking Water
Fluorometry
Iodates
Iodine
Lab-On-A-Chip Devices
Limit of Detection
Issue Date: 2018
Abstract: 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 (IO 3 - 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. © The Japan Society for Analytical Chemistry.
URI: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041863263&doi=10.2116%2fanalsci.34.161&partnerID=40&md5=288aa478e7cfadfd7cb4a7175891f37e
http://ir.swu.ac.th/jspui/handle/123456789/12938
ISSN: 9106340
Appears in Collections:Scopus 1983-2021

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