Biopolymers and cell. 2003; 19 (6): 553 - 557

Application of enzyme biosensor base on pH-sensitive field transistors for determination of glucose concentration in potato juice

I. V. Skryshevska, Y. I. Korpan, A. P. Soldatkin

A method for potato quality monitoring based on the determination of glucose concentration in potato juice using pH-sensitive field effect transistors with immobilized glucose oxidase has been proposed. Glucose concentration in potato juice was determined by a method of standard additions using the linear part of a calibration curve within dynamic range of 0.2—2 mM glucose concentration. To estimate the accuracy of glucose detection by the biosensor proposed, the measurements were also performed by a colorimetric method («Diagluc» enzymatic kit, Ukraine). A good correlation between these techniques is obtained.