Journal
MOLECULES
Volume 22, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/molecules22040575
Keywords
matrine; voltammetric sensors; Sophora flavescens; electrochemistry; hydroxyapatite
Funding
- National Natural Sciences Foundation of China [81403267]
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A simple and sensitive electrochemical sensor fabricated with graphene nanosheets (GNs) and a hydroxyapatite (HA) nanocomposite-modified glassy carbon electrode (GCE) was developed for the determination of matrine (MT). The as-prepared electrode (GNs/HA/GCE) was verified to outperform bare a GCE and GNs-modified electrode with increased oxidation peak currents and the decreased over-potential in the redox process of MT, indicating the great enhancement of electrocatalytic activity toward the oxidation of MT by the composite of GNs and HA. Under the optimized conditions, the oxidation peak currents were related linearly with the concentration of MT, ranging from 2 mu M to 3 mM, and the detection limit (S/N = 3) was 1.2 mu M. In addition, the proposed electrochemical sensor can be successfully applied in the quantitative determination of MT in Sophora flavescens extract.
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