Application of multivariate analysis to the effects of additives on chemical and sensory quality of stored coffee brew
Palabras clave : 
Coffee
Coffee brews
Additives
Volatile profile
Sensory analysis
Storage
Multivariate analysis
Aroma
Fecha de publicación: 
2008
Editorial : 
American Chemical Society
ISSN: 
0021-8561
Cita: 
Pérez-Martínez M, Sopelana P, De Peña AP, Cid C. Application of Multivariate Analysis to the Effects of Additives on Chemical and Sensory Quality of Stored Coffee Brew. J Agric Food Chem 2008 DEC 24;56(24):11845-11853
Resumen
The aim of this work was to obtain a black coffee brew to be consumed hot by extension of its shelf life, by addition of additives. Four pH-regulator agents (sodium and potassium carbonates and bicarbonates), one pH regulator and antioxidant (sodium citrate), three antioxidants [sodium ascorbate, ethylenediaminetetracetic acid (EDTA), and sodium sulfite], and lactoserum were tested by sensory analysis. Sodium carbonate and bicarbonate were selected for a study of the physicochemical (soluble and volatile compounds related to the sensory properties) and sensorial quality of coffee brew stored for 90 days at 4 degrees C. Although both additives extended the shelf life of the coffee brew up to 60 days, sodium carbonate was the chosen additive because it was the most useful in limiting the pH decrease and perception of sourness, which are some of the main factors involved in the rejection of stored coffee brews, and it better maintained the aroma and taste/flavor. Moreover, the application of multivariate analysis facilitated first the description of the global changes of the coffee brews with or without additives throughout the storage using principal component analysis and second the obtainment of a simple equation only with pH and caffeic acid parameters to discriminate the three types of coffee brews and simplify the analytical process, by means of the stepwise discriminant analysis.

Ficheros en este registro:
Fichero: 
Perez-Martinez et al 2008. JAFC 56 (24), 11845-11853.pdf
Descripción: 
Tamaño: 
390,12 kB
Formato: 
Adobe PDF


Los ítems de Dadun están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.