Journal
ELECTROCHIMICA ACTA
Volume 283, Issue -, Pages 772-779Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.05.148
Keywords
Histamine; Copper phosphate; Nafion coating; Freshness
Categories
Funding
- Ministry of Science and Technology (MOST) in Taiwan [MOST104-2313-B-005-036-MY3]
- Innovation and Development Center of Sustainable Agriculture from The Featured Areas Research Center Program
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Histamine is an important index for the estimation of allergic reaction and food freshness. This study develops a single-step dipping and coating method to fast produce an electrochemical histamine sensor based on a nafion-coated copper phosphate (Cu-3(PO4)(2))-dominated electrode. The flake-like Cu-3(PO4)(2) nanostructures can be fast formed on Cu-electrodeposited screen printed carbon electrodes (SPCEs) within 20 min. Moreover, the 1% nafion-coated Cu-3(PO4)(2)/SPCEs presented good selectivity for the detection of histamine in the pH 8.5 solution. The nafion/Cu-3(PO4)(2)/SPCEs can be integrated with a flow-injection device for the detection of histamine with a good correlation coefficient (R = 0.999) in the range of 5-500 ppm. The calculated limit of detection was 3.0 ppm. Moreover, the histamine concentration of 45 h-rotten fish samples detected by the nafion/Cu-3(PO4)(2)/SPCEs had a less than 10% deviation from that measured by the commercialized liquid chromatography-mass spectroscopy. The nafion/Cu-3(PO4)2/ SPCEs have great promise for estimating the freshness of fish meat without expensive separation equipment and labor-intensive labeling procedures. (C) 2018 Elsevier Ltd. All rights reserved.
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