| abstract |
[Problem] By adopting the configuration of the present invention, a large amount of the coloring agent is present on the surface side of the porous base material in the flow channel wall, so that the visibility is improved, and the amount of the coloring agent inside the flow channel wall is reduced. Since the ions contained in the coloring agent are suppressed from being eluted into the specimen, the measurement accuracy is enhanced. SOLUTION: This is a microfluidic device in which a flow channel sandwiched between flow channel walls is formed inside a porous substrate, wherein the flow channel wall contains a thermoplastic resin and a colorant. , 1. A microfluidic device, wherein the proportion of a coloring agent contained in the flow channel wall is higher in the surface area of the porous substrate in the flow channel wall than in the inside of the flow channel wall. [Selection diagram] Fig. 1 |