Density (r) was measured with a digital densimeter (Metter, USA), pH was measured using a digital pH-meter (Orion, USA), titratable acidity was determined with 0.1 mol equi/L NaOH (AOAC 947.05).
Density (r) was measured with a digital densimeter (Metter, USA),pH was measured using a digital pH-meter (Orion, USA), titratableacidity was determined with 0.1 mol equi/L NaOH (AOAC 947.05).