Microchip and liquid sending method for microchip

A microchip comprising:

• a micro flow channel;
• and an intermediate reservoir to temporally store liquid having been sent through the micro flow channel in a flow channel of the micro flow channel, wherein the intermediate reservoir is provided with a side path and wherein a capacity Vs of the intermediate reservoir is smaller than total amount of liquid sent to the intermediate reservoir;
• 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 the cross sectional area of the side path is smaller than that of the micro flow channel.

In 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:

• an initial step to arrange at least 2 liquid clusters in the micro flow channel of the upstream side;
• a storing step to store the liquids, 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;
• a filling step to fill the downstream side end portion of the side path with the sent liquids by sending all the liquids having been arranged in the micro flow channel to the intermediate reservoir;
• and
• a liquid sending step to send the liquids having been stored in the intermediate reservoir to the micro flow channel of the downstream side.

In 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 the upstream side of the intermediate reservoir to a micro flow channel on the 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:

• an initial step to arrange at least 2 different types of liquids in the micro flow channel of the upstream side in a non-contact state in which a gas is present between the liquids;
• a storing step to store the liquids, having been arranged in the micro flow channel by applying a liquid sending pressure to the downstream side, by sequential liquid sending to the intermediate reservoir;
• a filling step to fill the downstream side end portion of the side path with the sent liquids by sending all the liquids having been arranged in the micro flow channel to the intermediate reservoir;
• and a liquid sending step to send the liquids having been stored in the intermediate reservoir to the micro flow channel of the downstream side.