Preparation of a modified glucose oxidase reagent for the polarographic determinationof glucose with the Beckman "glucose analyzer".

In this modification, glucose oxidase, 140-180 U/ml, is dissolved in acetate buffer (pH 6):ethanol (96%):glycerol (80:10:10 by vol). Iodine and molybdate are used as catalysts, formaldehyde and mercuric iodide as preservatives, and octanol as an antifoaming agent. The reagent is suitable for use in the Beckman "Glucose Analyzer", it is stable at room temperature for at least six months, it is sensitive, it has a lubricating effect, and its cost is less than a fifth as much as the "Certified" Beckman reagent. It is not suitable for the measurement of glucose in samples containing maltose, cellobiose, gentiobiose, starch, and glycogen.