MICROCHANNEL CHIP AND METHOD FOR GAS-LIQUID PHASE SEPARATION USING SAME

摘要

A method for determining a liquid-soluble gas such as ammonia with satisfactory reproducibility and high sensitivity; a method for gas-liquid phase separation for use in that method; and a microchannel chip for the methods. The microchannel chip is equipped with: a microchannel formed in a substrate; and a gas-liquid phase separation microchannel connected to the downstream end of the microchannel and having a depth of 10-100 µm, the top of the separation microchannel being covered with a porous film. The gas-liquid phase separation method is a method in which a two-phase flow consisting of a gas phase and a liquid phase passes through the microchannel, the liquid-phase flow passing through a peripheral portion of the microchannel and the gas-phase flow passing inside the peripheral portion, and the gas phase is removed from the two-phase flow to leave the liquid-phase flow. The method involves: passing the two-phase flow through the microchannel within the microchannel chip; leading the flow to the gas-liquid phase separation microchannel; passing the flow through this region; and thereby discharging the gas-phase flow outside from the gas-liquid phase separation microchannel through the porous film.