[20p-E313-1~17] 1.5 Instrumentation, measurement and Metrology

[20p-E313-12] Concentration distribution measurement and interface instability analysis for acid-base neutralization reaction

〇Naoto Kakuta¹, Uema Takato¹, Washizuka Yutaka¹ (1.Tokyo Metropolitan Univ.)

Keywords:Liquid-liquid interface instability, Neutralization reaction, Concentration imaging

We have developed an imaging method of concentration and temperature using the absorption characteristics of water in the near-infrared region. In this study, liquid-liquid interface instability due to the neutralization reaction between a 1.0 mol/L aqueous solution of H₂SO₄ and a 2.0 mol/L aqueous solution of NaOH in a microfluidic channel is observed. The effect of the concentration profile, flow velocity, and relative position of acid and base on the instability is investigated.