| 摘要 |
PURPOSE:To measure exactly an equivalence point by interposing a constant voltage generator between electrodes and automatic potentiometric titrator, applying a prescribed voltage between the two electrodes on one hand and converting the current between the two electrodes to a voltage on the other hand then inputting the voltage signal to the automatic potentiometric titrator. CONSTITUTION:A power source part 5 which applies a prescribed potential difference between two electrodes 3 and 3 and a current/voltage converting part 6 which converts the current to a voltage when the current flows between the electrodes 3 and 3 are provided to a constant voltage generator 4. The one terminal of the part 5 is connected to the one electrode 3 via an ammeter 7, and the other terminal is connected to the other electrode 3 via the part 6. The voltage output from the part 6 is inputted to an automatic potentiometirc titrator 8. The titrator 8 processes arithmetically the potential difference signal inputted thereto and is connected to an automatic sample feeder 10 which regulates the feeding of the sample by controlling a sample feeding member 9. The titrator outputs the necessary result to recording paper 11 according to the correlation between the feeding of the sample and the input potential difference signal. The moisture is thus easily and surely determined by using the automatic potentiometric titrator. |
