This study investigate if the Electronic Tongue can be a useful and inexpensive tool for the qualitative analysis of fresh meat. Analyses were conducted mainly on beef broth to assess the ability of the instrument to separate significantly the samples according one or more classification variables. As an example protocol was applied to 29 finishing bulls (final LW=565±89.6 and age=468±73.3 days) randomly divided into three groups: T1 (n=8), T2 (n=8) and C (n=12). The T1 and T2 groups were respectively treated with two different illegal hormonal substances. The third group (C) served as control. On samples of M. Longissimus thoracis analyses were conducted by an ET with 8 ISE sensors sensitive at: Ca2+Mg2+, Cl-, CO32-, Cu2+, NH4+, NO2-, Pb2-, Zn2+. The implemented protocol needs 50g of minced cooked meat, cooled for 18h (0°C ÷ +4°C), heated to the analysis' temperature (25°C) and measured three times for 180s with intervals of 5s between recordings, using a Faraday cage. The Canonical discriminant analysis shows a significant separation among control and treated groups. The first canonical variable explains the 70% of between-class separation and divides T1 from T2 and C groups due to the Ca2+-Mg2+ and Zn2+ sensors. The second canonical variable divides T1 and T2 groups from the Control group due to the pH and Cl- sensor. The Electronic Tongue seems to be a useful tool to identify meat subject to illegal treatments.
Electronic Tongue applied to beef quality: a first approach
BARBERA, Salvatore
2011-01-01
Abstract
This study investigate if the Electronic Tongue can be a useful and inexpensive tool for the qualitative analysis of fresh meat. Analyses were conducted mainly on beef broth to assess the ability of the instrument to separate significantly the samples according one or more classification variables. As an example protocol was applied to 29 finishing bulls (final LW=565±89.6 and age=468±73.3 days) randomly divided into three groups: T1 (n=8), T2 (n=8) and C (n=12). The T1 and T2 groups were respectively treated with two different illegal hormonal substances. The third group (C) served as control. On samples of M. Longissimus thoracis analyses were conducted by an ET with 8 ISE sensors sensitive at: Ca2+Mg2+, Cl-, CO32-, Cu2+, NH4+, NO2-, Pb2-, Zn2+. The implemented protocol needs 50g of minced cooked meat, cooled for 18h (0°C ÷ +4°C), heated to the analysis' temperature (25°C) and measured three times for 180s with intervals of 5s between recordings, using a Faraday cage. The Canonical discriminant analysis shows a significant separation among control and treated groups. The first canonical variable explains the 70% of between-class separation and divides T1 from T2 and C groups due to the Ca2+-Mg2+ and Zn2+ sensors. The second canonical variable divides T1 and T2 groups from the Control group due to the pH and Cl- sensor. The Electronic Tongue seems to be a useful tool to identify meat subject to illegal treatments.
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