A refractometer is an optical instrument that uses the principle of refracting light to quickly and easily determine the refractive index (nD), sugar content (Brix), and concentration of a solution.Refractive index: It is also known as relative refractive index. It refers to the ratio of the sine of the incident angle γ to the sine of the refractive angle β when the light enters another medium and refracts. It is a physical constant. The refractive index of the medium relative to vacuum is called the refractive index.
2. The use of refractometer
Use one: measure the refractive index
Refractive index is the physical constant of a substance. Each substance has its own characteristic refractive index. The digital refractometer
can be used to measure medicines, flavors and fragrances, glass, plastics and other items.
Use two: measure sugar content
The refractometer can be used to measure the Brix value of sugar-rich samples such as juice, syrup, jam, honey, etc. The measured value is related to the sugar concentration of the measured sample. The Brix scale actually indicates the concentration of sucrose in water. The conversion value between the Brix value and the refractive index is data using ICUMSA (International Sugar Analysis Method Association).
Use three: measure food concentration
Soy sauce and other sauces, seasonings and other liquid foods contain sugar, salt and other substances. The measured value of the refractometer is directly proportional to the content of soluble solids in these solutions, so that the Brix value can represent the total content of soluble solids in the solution.
Use four: measure the concentration of aqueous solution
The refractometer can be used to determine the concentration of substances in aqueous solutions such as oil-based solutions, pharmaceuticals and heavy chemical products such as motor oils, detergents, glycol, cesium chloride, and sodium hydroxide. The Brix value of each solution is proportional to the concentration. The solution concentration can be determined by the Brix value measured by the refractometer and the established conversion table. The Brix value is the basic scale for determining the content of soluble solids in a solution.