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The refractometer is used to help identify gem materials by measuring their refractive index, one of the principal properties used in determining the type of a gemstone. Due to the dependence of the refractive index on the wavelength of the light used ( i.e. dispersion ), the measurement is normally taken at the wavelength of the sodium line D ...
Degrees Brix(symbol °Bx) is a measure of the dissolved solids in a liquid, and is commonly used to measure dissolved sugarcontent of an aqueous solution.[1] One degree Brix is 1 gram of sucrosein 100 grams of solution and represents the strength of the solution as percentage by mass. If the solution contains dissolved solids other than pure ...
Refractometers are frequently used by grape growers and kiwifruit growers for Brix testing of sucrose levels in their fruit. Refractometry is also used in the gelatin industry. To convert the RI of a gelatin sol (reported in Brix) to a gelatin concentration, one need only multiply by eight-tenths (0.8). A sol with a 10.0 RI would therefore be 8 ...
Must weights are commonly measured in the vineyard to monitor the ripeness of the grapes, which helps select the time of harvest. For this purpose, it is usually measured by using a refractometer. A few grapes are crushed between the fingers and the must is dripped onto the glass of the refractometer. The refractometer will be calibrated in a ...
In the Abbe refractometer the liquid sample is sandwiched into a thin layer between an illuminating prism and a refracting prism. The refracting prism is made of a glass with a high refractive index (e.g., 1.75) and the refractometer is designed to be used with samples having a refractive index smaller than that of the refracting prism.
The Oechsle scale is a hydrometer scale measuring the density of grape must, [1] which is an indication of grape ripeness and sugar content used in wine-making. It is named for Ferdinand Oechsle (1774–1852) and it is widely used in the German, Swiss and Luxembourgish wine-making industries. On the Oechsle scale, one degree Oechsle (°Oe ...
The International Commission for Uniform Methods of Sugar Analysis ( ICUMSA) is an international standards body, founded in 1897, [1] [2] that publishes detailed laboratory procedures for the analysis of sugar . The ICUMSA Methods Book [3] contains detailed instructions for analyzing raw, cane, white, beet, molasses, plantation white and ...
Some instruments are available with multiple scales, or the ability to input a special scale using known conversion information. There are some digital handheld refractometers that are IP65 water-resistant, and thus washable under a running faucet. See also. Refractometer Types Traditional handheld refractometer; Abbe refractometer
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