TY - JOUR
T1 - Semi-quantitative microfluidic paper-based analytical device for ionic silica detection
AU - Ogawa, Mami
AU - Katoh, Aya
AU - Matsubara, Ryuichi
AU - Kondo, Haruka
AU - Otsuka, Mizuki
AU - Sawatsubashi, Tetsuya
AU - Hiruta, Yuki
AU - Citterio, Daniel
N1 - Funding Information:
This work was financially supported through a collaborative research agreement between Keio University and the Chemical Research Department, Research and Innovation Center, Mitsubishi Heavy Industries Ltd.
Publisher Copyright:
© 2023, The Author(s), under exclusive licence to The Japan Society for Analytical Chemistry.
PY - 2023
Y1 - 2023
N2 - Silicate ions (SiO32−), or ionic silica, are known to cause silica scaling in industrial water applications when excess amounts are present; hence, concentrations must be monitored and kept at a constant low level. Ionic silica is conventionally measured by spectrophotometry in the form of its silicomolybdic complex based on the molybdenum blue reaction, but the operation process is complicated and not suitable for on-site detection. To solve these issues, microfluidic paper-based analytical devices (µPADs) have been gaining attention as portable, low-cost analytical devices suitable for on-site detection. The foldable origami type device described in this work enabled silica detection based on the molybdenum blue reaction, in the range of 50–1000 mg/L, with a practically detectable lowest concentration of 50 mg/L. The device showed selectivity for silicate ions and stability over 21 days when stored at 4 °C. The semi-quantitative analytical performance makes the proposed paper-based device attractive for on-site industrial monitoring. Graphical abstract: [Figure not available: see fulltext.].
AB - Silicate ions (SiO32−), or ionic silica, are known to cause silica scaling in industrial water applications when excess amounts are present; hence, concentrations must be monitored and kept at a constant low level. Ionic silica is conventionally measured by spectrophotometry in the form of its silicomolybdic complex based on the molybdenum blue reaction, but the operation process is complicated and not suitable for on-site detection. To solve these issues, microfluidic paper-based analytical devices (µPADs) have been gaining attention as portable, low-cost analytical devices suitable for on-site detection. The foldable origami type device described in this work enabled silica detection based on the molybdenum blue reaction, in the range of 50–1000 mg/L, with a practically detectable lowest concentration of 50 mg/L. The device showed selectivity for silicate ions and stability over 21 days when stored at 4 °C. The semi-quantitative analytical performance makes the proposed paper-based device attractive for on-site industrial monitoring. Graphical abstract: [Figure not available: see fulltext.].
KW - Industrial water analysis
KW - Microfluidics
KW - Molybdenum blue reaction
KW - Paper-based devices
KW - Silicate ion
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U2 - 10.1007/s44211-023-00345-1
DO - 10.1007/s44211-023-00345-1
M3 - Article
AN - SCOPUS:85153398328
SN - 0910-6340
JO - Analytical Sciences
JF - Analytical Sciences
ER -