2.2.3. Soluble solid content (SSC)
Approximately 50 g of blueberries were blended in a blender (Hamilton Beach, NC) for 30 s. Soluble solids in the juice were determined using a refractometer RHB- 32ATC (Cole–Parmer Instruments, Vernon Hills, IL). The mixture was kept at approximately 0 C to avoid enzyme degradation of the sample. Three measurements were taken on each sample and the results expressed as Brix.