A novel non-enzymatic electrochemical uric acid sensing method based on nanohydroxyapatite from eggshell biowaste immobilized on a zinc oxide nanoparticle modified activated carbon electrode (Hap-Esb/ZnONPs/ACE)

Abstract

Hydroxyapatite from eggshells waste obtained by one stage of heating modified with ZnONPs on ACE (Hap-Esb/ZnONPs/ACE) can detect uric acid.

Electrochemical determination of theophylline using a nickel ferrite/activated carbon-modified electrode

“…Activated carbon usually possesses a high surface area and chemical stability. It is an ideal carrier for several applications, such as adsorption [16], catalysis [17], and electrochemistry [18]. In particular, its application in the field of electrochemistry has attracted considerable attention.…”

ZnO nanorods anchored on CNTs incorporating carbon cloth flexible electrode as a highly sensitive electrochemical sensor

“…Glucose as an indispensable energy source for the activity of living cells, and is a critical technical indicator for human disease diagnosis, such as for diabetes, cardiovascular disease, blindness, and kidney failure [8,9]. UA is a vital compound in biological fluids, and abnormal UA concentration is responsible for various diseases, such as hyperuricemia, Lesch-Nyan disease, gout, kidney stones, and stroke [10]. Hydrogen peroxide (H 2 O 2 ) widely exists in biological system, and excessive concentration can induce various health issues such as Alzheimer's disease, Parkinson's disease, cardiovascular disease, tumors, cancer and neurodegeneration [11].…”

“…The electrochemical results were basically consistent with those obtained from the hospital. The percent recoveries were computed by equation(10):where C 3 is the concentration of the standard addition of UA, glucose and H 2 O 2 , while C 1 and C 2 stand for the serum and spiked samples concentrations, respectively, which can be calculated from the calibration curve. The observed recoveries of UA, glucose and H 2 O 2 in the human serum samples ranged from 98.33%-102.22%, 101.56%-104.33% and 100.4%-101.5%, respectively.…”

l-Phenylalanine-derived pseudopeptidic bioinspired materials: Zn(ii) induced fluorescence enhancement and precise tuning of self-assembled nanostructures

“…At the same time, a deficiency of zinc leads to some clinical diseases, such as brain dysfunction, high blood cholesterol, growth retardation, ischemic stroke, Parkinson's disease, Alzheimer's disease, etc. 12,15 On the other hand, the presence of zinc in excess will also cause several problems for humans. 16 Therefore, the World Health Organization (WHO) suggests that the most permitted Zn(II) in drinking water is 76 mM or 4.97 ppm.…”