Navegando por Autor "Rodarte, Mírian Pereira"

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    Espectroscopia no infravermelho médio e análise sensorial aplicada à detecção de adulteração de café torrado por adição de cascas de café
    (Sociedade Brasileira de Química, 2012) Tavares, Katiany Mansur; Pereira, Rosemary Gualberto Fonseca Alvarenga; Nunes, Cleiton Antônio; Pinheiro, Ana Carla Marques; Rodarte, Mírian Pereira; Guerreiro, Mário César
    Mid-infrared spectroscopy and chemometrics were used to identify adulteration in roasted and ground coffee by addition of coffee husks. Consumers’ sensory perception of the adulteration was evaluated by a triangular test of the coffee beverages. Samples containing above 0.5% of coffee husks from pure coffees were discriminated by principal component analysis of the infrared spectra. A partial least-squares regression estimated the husk content in samples and presented a root-mean-square error for prediction of 2.0%. The triangular test indicated that were than 10% of coffee husks are required to cause alterations in consumer perception about adulterated beverages.