refractometry
/ˌriːfrækˈtɑːmətri/
noun
- The scientific measurement of how much light bends (refracts) when it passes through a substance, used to identify materials or check their purity.
- Refractometry is a common method for checking the quality of engine oil.
- In chemistry class, we learned how refractometry helps identify unknown liquids.
- The lab technician used refractometry to determine the sugar concentration in the juice.