Soluble Solids Content (SSC): Soluble solid content (SSC) also called total soluble solids (TSS), can be determined in a small sample of fruit juice using hand refractometer (Plate 3). The spectrometer measures the refractive index, which indicates how much a light beam will be slowed down when it passes through the fruit juice. The refractometer has different scales 0-32OB, 28-62OB and (56-92OB) which can be read directly. For large size fruits, these should be cut from stem to blossom end and to the centre of the fruit to account for variability in SSC from top to bottom and inside to outside of the fruit. The fruit tissues should be mescerated thoroughly in pastle motor and then from the mescerated pulp the juice is extracted by passing through muslin cloth. A drop of juice is then put on the prism of the refractometer and TSS content can be read directly on the scale. However, in case of small fruits like grapes, the juice content can be extracted by simply pressing the whole fruit.
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