(1) Determination of transparent and translucent liquids:

(2) Abbe refractometer for measuring transparent solids:

There needs to be a flat polishing surface on the tested object. Open the light inlet prism, add 1-2 drops of bromonaphthalene to the polishing surface of the refracting prism, and wipe the polished surface of the tested object clean and place it on top to make good contact. At this point, it can be placed in the eyepiece

(3) Determination of semi transparent solids:

(4) Measure the concentration of sugar in sucrose: