The instrumental color of the samples was obtained using a Color
Quest XE colorimeter (Hunter Associates Laboratory, USA), with illuminant
D65, angle of 10° previously calibrated with a RSIN white
reference (L*=92.03, a*=−0.88, b*=0.63), as described by
Sánchez-Moreno, Plaza, de Ancos, and Cano (2006) and Rodrigo,
van Loey, and Hendrickx (2007). The samples were placed in glass cuvettes,
and three readings were obtained for each replicate.