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Published on: June 9, 2014
Colorimetric Indicator Based on Gold Nanoparticles and Sodium Alginate for Monitoring Fish Spoilage
Lissage Pierre1,2, Julio Elías Bruna Bugueño1,2, Patricio Alejandro Leyton Bongiorno3
1Packaging Innovation Center (LABEN), Food Science and Technology Department (DECYTAL), Technological Faculty, University of Santiago de Chile (USACH), Ave. Víctor Jara 3769, Santiago 9170124, Chile.
Abstract:
In this work, a colorimetric indicator based on gold nanoparticles (AuNP) and a biodegradable and eco-friendly polymer (sodium alginate, Alg.), was developed for the real-time detection of fish spoilage products. The AuNPs and the colorimetric indicator were characterized using UV-VIS, FTIR spectroscopies, TGA, DSC, XRD, TEM, and colorimetry. The UV-VIS spectrum and TEM showed the successful synthesis, the spherical shape, and the size of AuNPs. The results indicated color changes of the indicator in packaged fish on day 9 of storage at a refrigerated temperature (5 °C. These results showed the successful application of the colorimetric indicator in the detection of TVB-N in packaged fish.

