酸塩基反応の近赤外イメージングのための濃度回帰モデルの数値的評価

抄録

The near-infrared region of the aqueous acid-base reaction of formed salts (NaBr, KBr, KCl, and NaCl) by neutralization between 1400-1500 nm (OH band) at microchannels was modeled experimentally and numerically. In this study, aqueous acids (HCl and HBr) and bases (NaOH and KOH) of the same molarity were injected simultaneously in a y-shaped microfluidic channel with a constant flow rate of 0.1mm/s. The neutralization reaction of the aqueous acid-base through the NIR imaging experiment was validated by numerical simulations. The measured near-infrared data of NIR imaging absorbances and wavelengths were used for regression analysis of concentration prediction. Wavelength selection techniques were implemented to reduce experimental data of near-infrared captured absorbance images. The predicted ionic salt concentration by regression and numerical simulation of each chemical reaction shows the effects of acid-base concentration and specific ions on salt generation. The constructed models of both experimental and numerical results were applied for the study of the reaction-diffusion process of acid-base reactions inside microfluidic channels.