Publication:
Microfluidic analysis with front-face fluorometric detection for the determination of total inorganic iodine in drinking water

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Issued Date

2018

Resource Type

Article

File Type

application/pdf

ISSN

9106340

DOI

10.2116/analsci.34.161

Other identifier(s)

2-s2.0-85041863263

Rights Holder(s)

Scopus

Bibliographic Citation

Analytical Sciences. Vol 34, No.2 (2018), p.161-167

Suggested Citation

Inpota P., Strzelak K., Koncki R., Sripumkhai W., Jeamsaksiri W., Ratanawimarnwong N., Wilairat P., Choengchan N., Chantiwas R., Nacapricha D. Microfluidic analysis with front-face fluorometric detection for the determination of total inorganic iodine in drinking water. Analytical Sciences. Vol 34, No.2 (2018), p.161-167. doi:10.2116/analsci.34.161 Retrieved from: https://hdl.handle.net/20.500.14740/3933

Title

Microfluidic analysis with front-face fluorometric detection for the determination of total inorganic iodine in drinking water

Author(s)

Inpota P.
 Strzelak K.
 Koncki R.
 Sripumkhai W.
 Jeamsaksiri W.
 Ratanawimarnwong N.
 Wilairat P.
 Choengchan N.
 Chantiwas R.
 Nacapricha D.

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.

Subject(s)

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

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URI

https://hdl.handle.net/20.500.14740/3933

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Scopus: Year 1983-2021

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