SELECTIVE BIOCATALYTIC MEASURING CELL FOR FLOW-INJECTION ANALYSIS

A flow-through measuring cell developed for flow injection analysis (F IA) measurements is described. The cell works detecting amperometrical ly the hydrogen peroxide formed in an enzyme-catalyzed oxidation react ion of different substrates. he electrode consists of a thin, hollow d ialysis fiber introduced into the flow analysis channel, an enzyme sol ution film pumped inside the fiber, and a cellulose acetate protective layer-coated thin platinum wire-base sensor housed inside the hollow fiber. The measuring cell for two different model compounds, glucose a nd ethanol, was well applicable for the concentration determinations i n small volume solution aliquots. Important advantages of the cell are its versatility and its easy activation for measurements.