| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic titrator capable of reducing a measurement time and reducing drainage pump units.SOLUTION: A potentiometer 21 detects an equivalent point by calculating the largest point of the variation (differential value) of potential per unit and, when measurement is completed, supplies cleaning liquid in a tank 24 for cleaning liquid into six cleaning pipes 20 through an L-shaped joint 19 and a resin ring 18 by driving a cleaning pump 23 for a fixed time. Consequently, since the cleaning liquid is ejected from the cleaning pipes 20, a titration nozzle 11, sensors 12, 13, an agitation rod 14 and a drainage tube 16 are cleaned. Since a drainage pump 25 is driven together with the cleaning pump 23, a measured sample and the cleaning liquid are suctioned by the drainage tube 16, and discharged into a drainage tank 26. |
