Question: How would I measure the concentration of sugar or apple juice in different brands of apple juice.
Answer: According to the winedoctor.com the refractometer is a device that the juice from a wine grape is squeezed into which provides a sugar reading in the juice.
Another method, according to the wine doctor, is to use a hydrometer. The hydrometer is placed in the juice. The denser the juice, the higher the hydrometer floats; on the side of the stem is a scale, which allows the you to do a reading.














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