a glass electrode. The titratable acidity (TA) was determined according to the Association of Official Analytical Chemists (AOAC,
1997) Method No. 947.05 and expressed as T. One acidity unit ( T) means the amount of 1 mL 0.1 mol equiv/L NaOH used for the titration of 10 mL of beverage.
Initial pH and TA of the walnut milk were about 6.68 and 13.7 T, respectively.