Soluble solids, total acidity and vitamin C (VC) were
measured using the homogenized juice (Niu, 1990). Soluble
solids, total acidity and VC were determined using
Abbe refractometer, neutralization titration method and 2, 4-
dinitrophenylhydrazine colorimetry, respectively (Niu, 1990).
Sugar/acid ratio was defined as the ratio of soluble solids to total
acidity.