“…In particular techniques have had an impact on spectroscopy (Geladi, 2003). Using these resources, methods of development of food products and food analysis are generally simplified, such as control and monitoring processes (Catet et al, 1990;Robert, Bertrand, Devaux, & Grappin, 1987), food classification (Herranz, De La Serna, & Barro, 1990), detection of the adulteration of fruit pulp, honey and oils (Irudayaraj, Xu, & Tewari, 2003;Ozen, Weiss, & Mauer, 2003;Tay, Singh, Khrisnan, & Gore, 2002), sensory evaluation (Dever & Cliff, 1995;Gerbi, Zeppa, Antonelli, & Carnacini, 1997;Hough et al, 1996;Kjolstad, Isaksson, & Rosenfeld, 1990), determination of food fraud (Briandet, Kemsley, & Wilson, 1996) amongst other applications. Thus, chemometrics is effectively combined with multivariate analyses such as principal component analysis (PCA), discriminant analysis (DA) analysis and partial least squares (PLS), which provide the possibility of extracting resource spectra for investigating the spectral properties of samples (Lu, Yuan, Xu, & Qiang, 2000).…”