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A novel electrochemical sensor based on a nickel-metal organic framework for efficient electrocatalytic oxidation and rapid detection of lactate

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Abstract

Lactate serves as a biomarker for a plethora of microbial contamination in cow milk. In this context, a novel nickel-metal organic framework (Ni-MOF) modified platinum electrode was fabricated for the effective and reliable detection of lactate in cow milk samples. The Ni-MOF of mean size 12 μm in length and 0.7 nm in width was synthesized by an inexpensive mild solution method. The Ni-MOF modified platinum, platinum wire and Ag/AgCl were employed as the working, counter and reference electrodes to design a potentiostatic three-electrode configuration device. The developed Ni-MOF modified platinum electrode exhibits good sensitivities (106.617 and 29.533 μA mM−1) towards lactate over the wide linear ranges of 0.01–0.9 and 1–4 mM with a correlation coefficient of R2 = 0.99, a detection limit of 5 μM, a repeatability of 0.57% RSD and a stability of 95.3% for 20 days. The nano-flower like morphology of Ni-MOF provides accessible sites for the electro-oxidation of lactate and thereby high sensitivity to lactate. Furthermore, the developed electrode remained free from potential interfering species and thus provides a promising tool for rapid detection of lactate in cow milk samples.

Graphical abstract: A novel electrochemical sensor based on a nickel-metal organic framework for efficient electrocatalytic oxidation and rapid detection of lactate

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Publication details

The article was received on 01 May 2018, accepted on 04 Jun 2018 and first published on 04 Jun 2018


Article type: Paper
DOI: 10.1039/C8NJ02118J
Citation: New J. Chem., 2018, Advance Article
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    A novel electrochemical sensor based on a nickel-metal organic framework for efficient electrocatalytic oxidation and rapid detection of lactate

    P. Manivel, V. Suryanarayanan, N. Nesakumar, D. Velayutham, K. Madasamy, M. Kathiresan, A. J. Kulandaisamy and J. B. B. Rayappan, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ02118J

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