Fluid Separation Device, Gas Separation Device and Detection Device Using the Same

摘要

A fluid separation device includes a holding member which holds a first fluid sample and a light source which casts light with a specific wavelength onto the holding member. When the first fluid sample contains a specific substance, a maximum value L1 of absorptivity at which the specific substance absorbs the light with the specific wavelength and an absorptivity L2 at which another substance in the first fluid sample than the specific substance absorbs the light with the specific wavelength satisfy L1>L2, and an absorptivity L3 at which the holding member absorbs the light with the specific wavelength satisfies L3