0000000000532465
AUTHOR
José Antonio Piornos Martinez
Efecto del método de cálculo y de la presencia de falsos positivos en los umbrales de percepción
El objetivo de este trabajo ha sido demostrar que, a la hora de calcular umbrales de percepción, el método de cálculo elegido y las respuestas que son falso positivo (es decir, aquéllas en las que la respuesta positiva no corresponde a la detección real del aroma sino al azar al elegir la respuesta), tienen un efecto significativo sobre el valor de umbral calculado.
Effect of calculation methods and presence of false positives on perception thresholds
Perception thresholds are commonly used in food science to discriminate between those compounds that are more or less odour-active. It is not rare to use values from other studies and apply them to our data, however, we observed that the procedure to evaluate and calculate perception thresholds is not standardised. The aim of this study was to explore the influence of calculation methods on threshold values. To do so, we used a 3-AFC sensory procedure to determine the orthonasal and retronasal detection values of 26 compounds, amongst them some compounds that usually contribute to the aroma of strawberry and caramel (e.g. vanillin, Furaneol and damascenone). The thresholds were calculated b…