Optical Rotation of Stevia

Sweeteners like stevia are used in diet products. MCP polarimeters can be used to determine the equality of optically active stevia plant extracts. The specific rotation of single purified steviol glycosides can also be analyzed and subsequently their concentration can be verified.

Anton-Paar’s MCP polarimeters can be used to determine optical rotation of optically active substances like various sweeteners, e.g. stevia.

Stevia extract is produced from the leaves of the plant Stevia rebaudiana Bertoni and is composed of steviol glycosides, which are 50 to 450 times sweeter than saccharose.

The taste of stevia depends on the composition of steviol glycosides. This is of particular interest for the food and beverage industries. Each steviol glycoside has a specific optical rotation and can be separately purified by using chromatography methods. Using MCP polarimeters the quality of stevia powders or liquids can be analyzed. On top of that, the purity or the concentration of single purified steviol glycosides can be measured much faster and cheaper than using chromatography methods. 

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