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Use of plastic-based analytical device, smartphone and chemometric tools to discriminate amines

Reddy, SM, Bueno, L, Meloni, G and Paixao, TRLC (2015) Use of plastic-based analytical device, smartphone and chemometric tools to discriminate amines RSC Advances, 5 (26). pp. 20148-20154.

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Abstract

Amine-based volatile compounds released bymicroorganisms offer an alternative diagnostic approach for the identification of foodborne pathogens. Our objective has been to solvent cast cellulose acetate membranes to immobilise dyes and to use the resultant membranes as a plastic device to discriminate between different types of amines (triethylamine, isobutylamine, isopentylamine). The plastic device consisted of an array of membranes with five pH indicators (namely alizarin, bromophenol blue, chlorophenol red, methyl red and thymol blue). To analyse the data using a portable instrument, we used an iPhone (R) to obtain images and to extract red, green and blue colours (RGB) using in-house software before and after contact with each individual amine. All the RGB values extracted for each analyte allowed us to generate a unique colour pattern, which was used as input for non-supervised pattern recognition methods. Based on this analysis, it was possible to clearly discriminate between the amines studied without any misclassification, demonstrating that the device is well-suited for large-scale applications such as non-destructive methods to discriminate amines and, in future, for smart packaging applications in order to give early warning of rotting food that may lead to food poisoning. Additionally, a semi-quantitative analysis was performed and we have demonstrated that it is possible to quantify concentrations of amines down to 1 ppm.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
AuthorsEmailORCID
Reddy, SMUNSPECIFIEDUNSPECIFIED
Bueno, LUNSPECIFIEDUNSPECIFIED
Meloni, GUNSPECIFIEDUNSPECIFIED
Paixao, TRLCUNSPECIFIEDUNSPECIFIED
Date : 1 February 2015
Identification Number : 10.1039/c5ra01822f
Uncontrolled Keywords : COLORIMETRIC SENSOR ARRAY, POLY(VINYL CHLORIDE) MEMBRANES, BIOGENIC-AMINES, FOODBORNE PATHOGENS, GAS-CHROMATOGRAPHY, ENZYME ELECTRODES, FISH SPOILAGE, FOOD, IDENTIFICATION, SAUSAGES
Additional Information : This article is licensed under a Creative Commons Attribution 3.0 Unported License
Depositing User : Symplectic Elements
Date Deposited : 29 Sep 2015 17:27
Last Modified : 29 Sep 2015 17:27
URI: http://epubs.surrey.ac.uk/id/eprint/808468

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