Patent ID: 8920749

Claim:
A liquid sending method for a microchip having a micro flow channel and an intermediate reservoir, with a capacity Vs smaller than total amount of liquid to be sent and a side path, to temporally store liquid having been sent through the micro flow channel in a flow channel of the micro flow channel wherein the side path communicatively connects a micro flow channel on an upstream side of the intermediate reservoir to a micro flow channel on a downstream side of the intermediate reservoir and a cross sectional area of the side path is smaller than that of the micro flow channel, the liquid sending method for a microchip comprising: arranging at least 2 liquid clusters in the micro flow channel of the upstream side in a non-contact state in which gas is present between adjacent liquid clusters; storing the liquid clusters, having been arranged in the micro flow channel by applying a liquid sending pressure to the downstream side, by liquid sending to the intermediate reservoir; filling the downstream side end portion of the side path with the sent liquids by sending all the liquid of the liquid clusters having been arranged in the micro flow channel to the intermediate reservoir; and sending the liquids having been stored in the intermediate reservoir to the micro flow channel of the downstream side.