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Issue 16, 2012
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Monitoring of chicken meat freshness by means of a colorimetric sensor array

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Abstract

A new optoelectronic nose to monitor chicken meat ageing has been developed. It is based on 16 pigments prepared by the incorporation of different dyes (pH indicators, Lewis acids, hydrogen-bonding derivatives, selective probes and natural dyes) into inorganic materials (UVM-7, silica and alumina). The colour changes of the sensor array were characteristic of chicken ageing in a modified packaging atmosphere (30% CO2–70% N2). The chromogenic array data were processed with qualitative (PCA) and quantitative (PLS) tools. The PCA statistical analysis showed a high degree of dispersion, with nine dimensions required to explain 95% of variance. Despite this high dimensionality, a tridimensional representation of the three principal components was able to differentiate ageing with 2-day intervals. Moreover, the PLS statistical analysis allows the creation of a model to correlate the chromogenic data with chicken meat ageing. The model offers a PLS prediction model for ageing with values of 0.9937, 0.0389 and 0.994 for the slope, the intercept and the regression coefficient, respectively, and is in agreement with the perfect fit between the predicted and measured values observed. The results suggest the feasibility of this system to help develop optoelectronic noses that monitor food freshness.

Graphical abstract: Monitoring of chicken meat freshness by means of a colorimetric sensor array

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Publication details

The article was received on 14 Feb 2012, accepted on 05 Jun 2012 and first published on 06 Jun 2012


Article type: Paper
DOI: 10.1039/C2AN35211G
Citation: Analyst, 2012,137, 3635-3643
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    Monitoring of chicken meat freshness by means of a colorimetric sensor array

    Y. Salinas, J. V. Ros-Lis, José-L. Vivancos, R. Martínez-Máñez, M. D. Marcos, S. Aucejo, N. Herranz and I. Lorente, Analyst, 2012, 137, 3635
    DOI: 10.1039/C2AN35211G

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