Physicochemical properties, antioxidant activities and sensory characteristics of commercial gape vinegars during long-term storage

Abstract This study was designed to investigate changes in quality characteristics during long-term storage of five commercial grape vinegars (V1~V5). To determine long-term quality characteristics of vinegars, proximate (soluble solid, pH, total acidity, color, and antioxidant activity) and sensory descriptive analysis, were performed. Initial soluble solids were high in V4 and V5 (contained higher liquid fructose or grape concentrate), but after 12 mo of storage, soluble solids decreased significantly in V4 and V5 (non-sterile products). Initial total acidity was close to the amount of addit...