A refractometer is an instrument that can detect the refractive index ND and average dispersion NF-NC of transparent, semi transparent liquids or solids. Due to the specific refractive index of different substances, this instrument can detect the characteristics of substances according to different states. Therefore, the detection results of refractometers are often used as a basis for detecting the concentration, purity, and identification of unknown samples of raw materials, solvents, intermediates, and end products. It has become one of the indispensable and commonly used equipment in scientific research institutions, especially in the pharmaceutical field with outstanding applications.

Take 1-2 drops of the solution to be tested with a dropper and place them on the testing prism. Gently cover the cover plate, and if necessary, gently press the cover plate to evenly distribute the solution on the prism and avoid the generation of bubbles;

The instrument should be stored in a dry, dust-free, oil-free, and acid-free place to avoid corrosion or mold on optical components.