Screen-printed electrode modified with a composite prepared from graphene oxide nanosheets and Mn3O4 microcubes for ultrasensitive determination of nitrite

Akilarasan Muthumariappan, Mani Govindasamy, Shen Ming Chen, Kogularasu Sakthivel, Veerappan Mani

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

The authors describe a screen-printed electrode (SPE) modified with a composite consisting of Mn3O4 microcubes and thin sheets of graphene oxide for use in amperometric determination of nitrite. The composite was prepared by a hydrothermal method, and its morphology, elemental composition, diffraction, impedance and electrochemical properties were studied. The modified SPE displays excellent electrocatalytic activity towards nitrite, and the oxidation peak current (measured typically at 0.70 V vs. Ag/AgCl) is related to the concentration of nitrite in the range between 0.1 and 1300 μM, with a 20 nM detection limit. The method was successfully applied to the determination of nitrite in spiked samples of beef and water. [Figure not available: see fulltext.].
Original languageEnglish (US)
Pages (from-to)3625-3634
Number of pages10
JournalMicrochimica Acta
Volume184
Issue number9
DOIs
StatePublished - Sep 1 2017
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry

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