2色LIF法を用いたマイクロチャネル内における化学反応流の画像計測(S20-4 撹拌・混合,S20 マイクロ・ナノスケールの流動現象)

概要

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This paper presents a novel pH measurement technique for microfluidics devices, "2-Color Laser Induced Fluorescence". In this technique, an undesirable influence of excitation light distribution can be eliminated by dividing one fluorescence, image with the other one taken at the same time. This can simplify measurement procedure in terms of omitting fluorescence intensity normalisation at each pixel, and could measure a sealer distribution more accurately than 1-color LIF. In this study, the proposed method was applied to neutralization chemical reaction in T-type microchannel. Using Fluorescein and Rhodarnine-B, the divided value of fluorescence intensities was calibrated with 7 points of pH. Spatial intensity error can be reduced to about 80 to 90% as compared with 1-color LIF. As a result, pH distibution of neutralization reaction between acetic acid and ammonia at T-junction .was visualized quantitatively at some flow rate conditions.
一般社団法人日本機械学会の論文
2004-09-04