Density meters and refractometers continue to evolve to suit researchers’ ever-expanding needs
Many factors can negatively affect accuracy in refractometry. The secret is to eliminate them.
A material’s refractive index—essentially how much it bends lights—can be used to describe the material and its use.
Refractometer manufacturers quote accuracy and reproducibility to the fourth, fifth, and sometimes even the sixth decimal places. A good manufacturer will only advertise this level of accuracy after carefully running standards.
Refractometry is thought to be a limited analytical technique that works best with binary solutions—for example, salt or sugar solutions—where it excels at precise concentration measurements.
Refractometers are analytical instruments that measure the refractive index (RI) of liquids. Physicists define RI as the ratio of the speed of light in a vacuum divided by its speed through a test medium.