A Novel Chronoimpedimetric Glucose Sensor in Real Blood Samples Modified by Glucose-Imprinted Pyrrole-Aminophenylboronic Acid Modified Screen Printed Electrode

In this study, a molecularly imprinted sensor technology is engineered to detect glucose in real blood samples by chronoimpedimetrically. The imprinting process of glucose (Glc) was carried out by electrochemical polymerization of aminophenylboronic acid (APBA) and pyrrole (Py) by performing cyclic voltammetry (CV). Afterwards, glucose molecule was removed from imprinted surface by 5 % acetic acid to reveal glucose imprinted cavities. Electrochemical Impedance Spectroscopy (EIS) was used to characterize sensor modification steps and glucose removal. Glucose monitoring process was carried out chronoimpedimetrically(CI) for the first time in real blood samples. Calibration curve was prepared between 20-800 mg/dL. The standard deviations of the 18 calibration curves R-2 were calculated as 0.9866 +/- 0.0066 to assess reproducibility. Recovery was calculated by using 105 mg/dL Glc Serum Sample, which was monitored by auto analyzer and into this sample 50 mg/dL Glc added and our sensor response was 147.92 +/- 2.43 mg/dL, 98.6 +/- 1.62 % (n=5). Non-imprinted (NIP) sensor gave no signal for the glucose concentration.