Patent ID: 8646316

Claim:
A liquid sample quantity determiner comprising: an instrument main body that has an upstream side capillary flow path formed in series with a liquid sample inlet, and a downstream side capillary flow path formed sandwiching a space with the upstream side capillary flow path; and a slide body that is slidably provided in the space, communicatively connecting the upstream side capillary flow path and the downstream side capillary flow path to each other, and formed with a quantity determining capillary flow path that quantifies a liquid sample introduced from the liquid sample inlet, wherein the upstream side capillary flow path, the quantity determining capillary flow path, and the downstream side capillary flow path are reduced in diameter in this order, and when the slide body is at a liquid sample quantity determination position, an upstream side opening of the quantity determining capillary flow path is contained in a downstream side opening of the upstream side capillary flow path, and an upstream side opening of the downstream side capillary flow path is contained in a downstream side opening of the quantity determining capillary flow path.