Journal
FOOD CHEMISTRY
Volume 190, Issue -, Pages 818-823Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.06.035
Keywords
Dual enzymatic biosensor; Histamine; Putrescine; Screen-printed electrodes; Simultaneous determination
Funding
- Junta de Castilla y Leon [BU212A12-2]
- Ministerio de Ciencia e Innovacion (MICINN)
- Fondo Europeo de Desarrollo Regional (FEDER) INNPACTO (SERIBIO) [TEC2009-12029, TEC2013-40561-P]
- MICINN scholarship FPI
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A disposable electrodic system consisting of two working electrodes connected in array mode has been developed for the simultaneous determination of histamine (His) and putrescine (Put). Histamine deshydrogenase and putrescine oxidase enzymes were respectively immobilized by crosslinking on each working screen-printed electrode, both modified with tetrathiafulvalene. The dual system allowed the simultaneous amperometric determination of both species by measuring the oxidation current of the mediator in each working electrode. The effect of other potentially interfering biogenic amines was also evaluated. The capability of detection was of 8.1 +/- 0.7 for His and 10 +/- 0.6 mu M for Put. The precision in terms of relative standard deviation was of 3.5% and 6.7% for His and Put, respectively. The developed biosensor was successfully applied to the determination of His and Put in different food samples. (C) 2015 Elsevier Ltd. All rights reserved.
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