ELECTROCHEMICAL DETECTOR FOR ANALYSING LIQUID OF COMPLEX SALT AND CHEMICAL CONTENT

摘要

FIELD: physics.;SUBSTANCE: electrochemical detector for analysing liquid of complex salt and chemical content has a sealed case, working electrodes and a comparison electrode. The comparison electrode is mounted at the central axis of the case and working electrodes are placed in concentric circles around the comparison electrode. The electrodes are in form of profiled pipes with inserts made from dielectric polymer. At the ends of the insert which touch the analysed medium, there are electrochemical sensor membranes with ion-selective and/or cross-sensitive properties. The electrochemical detector has tightly attached electroconductivity sensor and temperature sensor. The input of each amplifier is connected to the input lead of each working electrode, and the output to a switching device. The output of the switching device is connected to the input of the amplifier of an analogue-to-digital converter, and the output to the processor of a measuring unit. The processor of the measuring unit is connected through an amplifier stage to electroconductivity and temperature sensors. The input of the processor of the measuring unit is connected to the output of the analogue-to-digital converter and through an amplifier stage to the electroconductivity sensor and temperature sensor. The output of the processor of the measuring unit is connected to the input of a data accumulator and a USB-port controller.;EFFECT: possibility of measurement in a small volume of liquid.;7 cl, 5 dwg