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- W2413615295 abstract "To determine the enantiomeric impurity contents of domestic timolol maleate in bulk drugs and eye drops.Enantiomer impurity of timolol was assayed by chiral high performance liquid chromatography. The chromatographic conditions were as follows:chiralcel OD chiral column (4.6 mm ×150 mm, 5μm), detection wavelength:297 nm, mobile phase:hexane-isopropanol-diethylamine (480:20:1), column temperature:25 ℃, flow rate:1.0 ml/min, sample injection volume:5 μl.The resolution between R- and S-timolol was more than 4. The enantiomeric impurity contents were less than 0.67% on average in two batches of timolol maleate bulk drugs, and 0.31% on average in three batches of timolol maleate eye drops.Enantiomeric impurity contents in each batch of products all meet European Pharmacopoeia criteria, which can be used as references in Chinese Pharmacopoeia criteria." @default.
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- W2413615295 date "2014-03-01" @default.
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- W2413615295 title "[Determination of enantiomeric impurity of timolol maleate in bulk substances and eye drops]." @default.
- W2413615295 doi "https://doi.org/10.3785/j.issn.1008-9292.2014.03.007" @default.
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