| 摘要 |
PURPOSE:To make possible the exact metering of a reagent by providing a deaerating part to a reagent dispersing line and removing preliminarily the gaseous component dissolved in the reagent before sucking the reagent into a reagent metering pump. CONSTITUTION:A vacuum pump 23 is operated and the piston of the metering pump 11 is sucked and moved where a rotor 15 of a three-way solenoid valve 7 is rotated 180 deg. toward the right after the confirmation that a reduced pressure chamber 18 attains the intended 100mmHg pressure. The reagent 22 in a reagent vessel 21 enters first a liquid feed tube 20 and in succession, the reagent enters a synthetic resin film tube 17 where the foam generated in the reagent and the gaseous component dissolved in the reagent are separated through the porous wall of the tube 17. The carry over of the foam into the pump 11 is thus prevented. The rotor of the three-way solenoid valve is rotated 180 deg. to the right when the reagent is exactly metered. The piston of the pump 11 is thereby moved to the discharge side to disperse the reagent into a reaction tube 2. |
