A Cheap Amperometric and Optical Sensor for Glucose Determination

Abstract

A cheap amperometric and optical sensor for glucose, based on an ITO electrode coated with electrodeposited Co/Al hydrotalcite (HT) is described. Cobalt based HT shows a reversible electrochromic behavior which can be exploited for the development of an optical sensor. Working in the optical mode, the linearity range of the sensor is between 0.008 and 0.13 mM with a sensitivity of 1.14 mM À1 · cm À2, whereas when working in the amperometric mode, the linearity ranges from 0.002 to 1.5 mM with a sensitivity of 4.24 Â 10 À4 A · mM À1 · cm À2 . The sensor has been successfully employed for the determination of glucose in a serum sample.

Amperometric glucose sensor based on glucose oxidase immobilized on gelatin-multiwalled carbon nanotube modified glassy carbon electrode

“…In human serum, glucose is present with other common interferences like ascorbic acid (AA), uric acid (UA), acetaminophen (AP), pyruvate (PA) and lactate (LA). The normal physiological levels of glucose, AA and AP in human serum are about 5, 0.2 and 0.1 mM respectively [31,32]. Similarly the normal level of lactate in the human serum is 0.52 ± 0.33 mM [33].…”

Nanoporous cobalt oxide nanowires for non-enzymatic electrochemical glucose detection

“…Since the normal physiological level of glucose (3-8 mM) is more than 10 times higher than those of the other three interfering species [33], the molar ratio of 1:10 was used for AA, UA and DA to estimate their interference effects in the process of glucose sensing. Fig.…”

Multi-wall carbon nanotube–NiO nanoparticle composite as enzyme-free electrochemical glucose sensor

“…The normal physiological level of glucose, AA, DA and UA in blood serum are about 5 mM, 0.02 mM, 0.2 mM and 0.1 mM, respectively [52][53][54]. Hence to demonstrate interference effect, the amperometric response of glucose was measured by successive addition 0.5 mM, glucose and interfering species in 0.2 M NaOH under a working potential of +350 mV.…”