METHOD AND DEVICE FOR MEASURING ACTIVITY OF IONS IN SOLUTIONS Russian patent published in 2005 - IPC

Abstract RU 2244917 C1

FIELD: measuring engineering.

SUBSTANCE: method includes compensating variations of voltage sink-source of indicating ion-selective field-effect transistor caused by the deviation of potential of ion-selective diaphragm, measuring temperature of auxiliary electrode, and determining the ion activity from the mathematical model of the physicochemical processes inside the measuring cell. The device has auxiliary electrode and indicating ion-selective field-effect transistor temperature sensor of ion-selective diaphragm, which are submerged into the solution to be investigated, two operation amplifiers, resistor, three current sources, voltage source, commutator, second amplifier, analog-digital converter, control unit, indicator, and additional temperature sensor of the auxiliary electrode.

EFFECT: enhanced accuracy of measuring.

6 cl, 1 tbl

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RU 2 244 917 C1

Authors

Sazonov V.V.

Kilimnik A.B.

Shelokhvostov V.P.

Chernyshov V.N.

Dates

2005-01-20—Published

2003-05-05—Filed