Abstract A semiconducting metal-oxide array for monitoring ®sh freshness

• Main Authors: Jeremy Hammond A, Brent Marquis A, Ray Michaels A, Brian Oickle A, Bruce Segee B, John Vetelino B, Al Bushway D, Mary Ellen Camire D, Kathy Davis-dentici D
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2001
• Subjects: Fish freshness; SMO; Sensor array; Food sensing; atlantic cod; Atlantic salmon; Gadus morhua; Salmo salar
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.117.5557; http://php.cse.psu.edu/~vijay/biosensors/sdarticle-nn.pdf

An array of semiconducting metal-oxide (SMO) chemiresistive sensors can quantitatively measure the freshness of Atlantic salmon (Salmo salar), haddock (Melanogrammus aegle®nus), and Atlantic cod (Gadus morhua). A variety of SMO ®lms were tested, including ®lms containing oxides of copper and tin, and commercially available tin-based SMO ®lms. Analytical testing of the ®sh samples was performed in conjunction with SMO sensor testing of the volatile gases emitted from the degrading ®sh. Testing included the use of a sensory evaluation panel and tests incorporating amine colorimetric methods, pH analyses, and bacterial aerobic and anaerobic plate counts. Sensory analysis, trimethylamine (TMA) content, pH, and aerobic and anaerobic plate counts provided results that correlated well with each other and with SMO sensor results. A radial basis function (RBF) neural network was designed and used to classify the day of ®sh degradation (1±15) from