Refraktometri
Sign in to saveRefractometry is the analytical method of measuring substances' refractive index (one of their fundamental physical properties) in order to, for instance, assess their composition or purity. A refractometer is the instrument used to measure refractive index ("RI"). Although refractometers are best known for measuring liquids, they are also used to measure gases and solids, such as glass and gemstones.
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It is catalogued under the topic Measurement.
Its subject is documented across 19 Wikipedia language editions.