Chemical analysis
pH and redox potential values of the samples were measured at room temperature using a pH meter (MA235, Mettler, Toledo, Switzerland). The titratable acidity was determined after mixing 10 mL of sample with 10 mL of distilled water and titrating with 0.1 N NaOH using 0.5% phenolphthalein (26).
Statistical analysis
All results were an average of three replicate determinations and the significant differences among the means were analyzed using the two-way ANOVA test (based on the complete randomized design (full Factorial test design) from Minitab software (Version 13, 2002).