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Polarimetry is a method that utilizes the optical rotation phenomenon when plane-polarized light passes through a liquid or solution containing certain optically active substances (such as compounds with asymmetric carbon atoms) to measure drugs or check their purity, and can also be used to determine content.

Mainly used for: drug identification, impurity inspection, and content determination.

Specific rotation is an important physical constant of optically active substances, which can be used to distinguish drugs or check their purity, and can also be used to determine content. The optical rotation of a substance is not only related to its chemical structure but also to the concentration of the solution, the path length of the light, as well as the temperature and the wavelength of the polarized light during measurement.

Unless otherwise specified, this test is performed in accordance with the Chinese Pharmacopoeia 2020 Edition Part IV - 0621 testing standard.

Chemical testing services are available nationwide, including Shanghai, Taiyuan, Shenyang, Changchun, Nanjing, Hangzhou, Hefei, Fuzhou, Nanchang, Jinan, Zhengzhou, Wuhan, Changsha, Guangzhou, Haikou, Nanning, Chengdu, Guiyang, Kunming, Xi'an, Lanzhou, Xining, Yinchuan, Shijiazhuang, Harbin, and other regions.