| 摘要 |
Disclosed herein is a dispensing device capable of reducing the dead volume of a liquid sample. The dispensing device includes a main channel (3) whose one end is connected to a sample inlet (13) and whose other end is connected to a sample outlet (15), and a plurality of branch channels (5) connected to the main channel (3). The branch channels (5) are each connected to different liquid reservoirs (7) at their ends located on the opposite side from the main channel (3). A plurality of high inflow-withstanding pressure sections (17) having a higher inflow-withstanding pressure than the branch channel (5) are provided in the main channel (3) between the branch channels (5) and (5) and between the branch channel (5) and the sample outlet (15). Each of the high inflow-withstanding pressure sections (17) has a channel inner wall which forms a contact angle of 90� or larger with a liquid sample. A liquid sample introduced into the main channel (3) through the sample inlet (13) reaches a branch point between the first branch channel (5) and the main channel (3). Then, the liquid sample flows into the first branch channel (5) and the liquid reservoir (7) because the high inflow-withstanding pressure section (17) is provided in the main channel (3) between the first branch point and the next branch point. After the first branch channel (5) and the liquid reservoir (7) are filled with the liquid sample, the liquid sample passes through the high inflow-withstanding pressure section (17) and is led to a branch point between the next branch channel and the main channel. |
