Voltammetric determination of vitamin B{sub 6} (pyridoxine) at a graphite screen-printed electrode modified with graphene oxide/Fe{sub 3}O{sub 4}@SiO{sub 2} nanocomposite
Journal Article
·
· Russian Chemical Bulletin
- Graduate University of Advanced Technology, Department of Chemistry (Iran, Islamic Republic of)
The preparation and study of electrochemical properties of a graphite screen-printed electrode (SPE) modified with the GO/Fe{sub 3}O{sub 4}@SiO{sub 2} (GO is graphene oxide) nanocomposites are described. The morphologies of the GO/Fe{sub 3}O{sub 4}@SiO{sub 2} nanocomposites were examined by scanning electron microscopy. The electrochemical oxidation of vitamin B{sub 6} (pyridoxine) on SPE modified with the GO/Fe{sub 3}O{sub 4}@SiO{sub 2} nanocomposite was investigated by cyclic voltammetry, differential pulse voltammetry, and chronoamperometry. Under optimum conditions (pH 7.0), the vitamin B{sub 6} oxidation at the surface of the modified SPE occurs at a potential about 190 mV less positive than that at the unmodified SPE. A linear voltammetric response for vitamin B{sub 6} was obtained in the concentration range 1.0•10 {sup 6}—9.0•10 {sup 4} mol L{sup –1} with a detection limit of 5.2•10 {sup 7} mol L{sup –1} using differential pulse voltammetry. The developed sensor was also successfully applied for determination of trace level of vitamin B{sub 6} in both the standard vitamin B{sub 6} sample and biological samples (urine).
- OSTI ID:
- 22863392
- Journal Information:
- Russian Chemical Bulletin, Journal Name: Russian Chemical Bulletin Journal Issue: 2 Vol. 67; ISSN RCBUEY; ISSN 1066-5285
- Country of Publication:
- United States
- Language:
- English
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