| abstract |
An object of the present invention is to provide a trace liquid weighing structure capable of quantitatively handling a trace amount of liquid by a simple operation with a simple configuration. A first flow path (flow path A) and a second flow path (flow path B) each extending in a predetermined direction, and a third flow path opening in a flow path wall of the first flow path. And one end of the third flow path and the second flow path which are opened in the flow path wall of the second flow path and which are hard to wet (or relatively Utilizing a structure having a fourth flow path (flow path D) having a property of being difficult to exert an attractive force) and being thinner than the other three flow paths, the liquid introduced into the first flow path is After being drawn into the third flow path, the liquid remaining in the first flow path is removed, and a liquid having a volume corresponding to the volume of the third flow path is weighed. When the liquid is filled in the second flow path, the second flow path is opened in the flow path wall of the fourth flow path and is thinner or the same thickness as the fourth flow path and is less likely to be wet (or relatively capillary tube). A structure is further provided with a fifth flow path (flow path E) formed of a flow path wall having a property of being difficult to exert an attractive force. [Selection diagram] Fig. 4 |