Analyzing and correlating instrumental and sensory data: A multivariate study of physical properties of cooked wheat noodles

Abstract

The physical characteristics and sensory properties of eight wheat noodles formulated with wheat gluten (0, 3 and 6%) and glyceryl monostearate (0, 1.4 and 2.8%) were investigated. Color parameters and texture attributes were instrumentally characterized. Four visually observed appearance attributes and four manually or orally assessed textural attributes, were sensorially profiled quantitatively. Glyceryl monostearate, at 1.4% and 2.8% fortification levels, had more profound influences than wheat gluten, at 3% and 6% fortification levels, and exhibited different behaviors in most of the physical and sensory properties of cooked noodles. These two additives well separated the eight noodle products along two independent dimensions. As to instrumental-sensory relations, principal component analysis (PCA), partial least squares regression (PLS) and Procrustes analysis (PA) confirmed that the instrumental and sensory analysis procedures reached a true consensus.