Sample Type Concentration of glucose (mM) Concentration Recovery (%) RSD (%) Proposed methoda Spectrophotometric methoda Glucose added (mM) Glucose founda (mM) Milk 80.5 78.4 50.0 58.0 116 1.90 100 106 106 2.03 200 217 108 1.52 Red wine 41.8 40.2 50.0 54.5 109 1.90 100 107 107 1.25 200 204 102 1.33 Fruit bean juice 110 112 80.0 87.0 108 2.00 160 172 107 2.90 320 341 106 3.00 aAverage values from triplicates.

Table 3: Determination of glucose in real samples and the recovery test using the proposed glucose biosensor and a spectrophotometric method.