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MEASUREMENT OF CONCENTRATION OF STRONG ACID OR STRONG BASE IN SOLUTION WITH WATER
MEASUREMENT OF CONCENTRATION OF STRONG ACID OR STRONG BASE IN SOLUTION WITH WATER
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机译：水溶液中强酸或强碱浓度的测量
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摘要
PURPOSE:To enable automatically continuous measurement, by arranging a metal terminal connected electrically to an electrochemical system extending outside a container as main component while a film electrode adapted to generate a fixed internal potential difference solely depending on the temperature is used between the metal terminal and a film phase. CONSTITUTION:An indicator electrode 2 as film electrode, a reference electrode 3 and a terminal 4 for measuring liquid temperature are immersed into a measuring tank 1, a sample solution is introduced into the tank 1 through an liquid feed tube 5 and drained outside the tank 1 through a drain tube 6. While the sample solution with the unknown concentration is running through the tank 1, the terminal voltages between the electrodes 2 and 3 is passed through an impedance converter 7 and a signal involving the liquid temperature detected with a terminal 4 is converted into a voltage with a signal converter 8. Both are inputted into a concentration computing unit 9. With the computing unit 9, the output signal voltages of the converters 7 and 8 obtained from the sample solution are compared with the reference data separately to measure the concentration corresponding to the sample solution, which is outputted. This enables automatically continuous measurement of the concentration of the sample solution.
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