| 摘要 |
An end of a capillary storing a sample in its interior is inserted into a sample reservoir in a microchip and positioned near an inlet of a channel connecting to the sample reservoir. Electrodes are placed in the other end of the capillary and a waste reservoir. A predetermined voltage is applied between the electrodes so that a potential is applied between the other end of capillary and waste reservoir. As a result, the sample in the capillary is introduced electrophoretically into a separating medium in the channel. When the sample has been introduced into the channel after the lapse of a specified time, the voltage application between the electrodes is stopped and the capillary is pulled out of the sample reservoir. The sample can be introduced into the channel without placing it in the sample reservoir in a filling amount.
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