2011
Hernandez, P., Rodriguez, J.A., Salazar, V., Álvarez-Romero, G.A., González-Montiel, S., Castrillejo Y. Determination of glucose by flow injection analysis with amperometric detection at Fe(III)-(tris(3,5-dimethyl-1-pyrazolyl)borate)2 modified electrodes, Journal of the Mexican Chemical Society, 2011, Vol. 55, p. 120-125, ISSN 1870-249X
Abstract
A modified screen printed electrode with [Fe(tris(3,5-dimethyl-1-pyrazolyl)borate)2] + [FeCl4]-, installed as part of a flow injection system, was used as an amperometric detector to determine hydrogen peroxide and glucose after on-line reaction with glucose oxidase. The influence of experimental variables on sensitivity, such asthe flow rate, injection volume and reaction coil length, was evaluatedusing a two-level factorial experimental design. Under optimal conditions, detection limits of 15 M and 0.5 mM for H2O2 and glucose, respectively, were obtained. A sampling rate of 60 determinations h-1 was achieved; the relative standard deviation of analytical measurements was <5.0%. The method was validated by comparing the obtained results with those provided by the enzymatic spectrophotometric method; no significant differences were observed (p < 0.05). Keywords: Glucose, Hydrogen peroxide, Flow injection system.
Prevalence and Antimicrobial Resistance Patterns of Salmonella from Different Raw Foods in Mexico
Simultaneous determination of tetracyclines in poultry muscle by capillary zone electrophoresis
Metal content evaluation and its effect on the stability of anthocyanins