食糖理化分析>物理性指标检测 | 蔗糖和薄荷醇的旋光测定-JASCO 公司

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应用领域	食品/农产品
检测样本	食糖
检测项目	理化分析>物理性指标
参考标准	无

Optical rotation is the property of substances, rotating the plane of polarization when linearly-polarized light passes through such substances. This is the property which occurs specifically to optical active substances in which the refractive indices of right and left circularly-polarized light are different. Optical rotation that rotate light in a clockwise direction as viewed towards the light source is defined as dextrorotation (+) and the opposite, levorotation (-).

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JASCO P-2000旋光仪
型号：P-2000

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The angle of rotated plane of polarization is called as optical rotation and polarimeter is the instrument to measure such optical rotation. Optical rotation is proportional to cell pathlength and is related to sample concentration, measurement wavelength and temperature. The specific optical rotation [a]tx is calculated from the following formula using temperature t (ºC), wavelength x (nm), cell pathlength 1 (dm), sample concentration c (g/100 ml) and measured optical rotation a.

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