Patent ID: 7850909

Claim:
An analytical tool comprising: a liquid introduction port, at least one flow path for moving a sample liquid introduced through the liquid introduction port, a reaction chamber communicating with said at least one flow path, and a separation film disposed below the liquid introduction port and above said at least one flow path for filtering the sample liquid supplied to the liquid introduction port before introducing the sample liquid to said at least one flow path; wherein the sample liquid is caused to move through the separation film in a thickness direction of the separation film for filtration; wherein a branching flow path branches from said at least one flow path at a branching position upstream from and close to the reaction chamber; wherein the branching flow path communicates with a first gas discharge port closed by a first seal film that is openable by needle insertion for supplying the sample liquid from the liquid introduction port to the branching position; and wherein the reaction chamber communicates with a second gas discharge port closed by a second seal film that is openable by needle insertion for supplying the sample liquid beyond the branching position to the reaction chamber.