Since the major color of pineapple juice is yellow, theamount of this pigment in pineapple flesh is an excellent measure of quality (Mehrlich & Felton, 1980).
In this study, the b value was used as an indicator to describe the pigment destruction in the juice. Fig. 3 shows that the first order kinetic model fitted well to parameter b which was consistent with previous works (Avila & Silva, 1999; Barreiro et al., 1997).