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Open Access An enantiospecific HPLC method for the determination of (S)-enantiomer impurities in (R)-tolterodine tartarate

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A high-performance liquid chromatographic method was developed for the separation of the enantiomers of tolterodine tartarate. The proposed method was applied to the determination of (S)-isomer in (R)-tolterodine tartarate, and satisfactory results were obtained. The enantiomers of tolterodine tartarate were separated on a Chiralpak AD-H (250 mm × 4.6 mm) column containing amylose tris-(3,5-dimethylphenyl-carbamate) at room temperature. The mobile phase consisted of n-hexane and isopropyl alcohol in the ratio of 85 : 15 (v/v) with 0.075% triethylamine (TEA) and 0.05% trifluoroacetic acid (TFA) as the additive. The flow rate was kept at 0.5 ml/min, and UV detection wavelength was set at 283 nm. The calibration curves of (S)-enantiomer in the concentration range from 0.05 μg/ml to 1 μg/ml range were linear. The relative standard deviations of within-day and between-day were less than 2% (n = 3). The limit of detection (LOD) was 0.75 ng (S/N = 3) and the limit of quantification (LOQ) was 0.05 μg/ml (RSD < 4.1%, n = 3). The determination recoveries of the (S)-enantiomer were in the range of 98.2–104.8%. The results demonstrated that the developed HPLC method was a reliable, simple technique and was applicable to the purity determination of (R)- tolterodine tartarate.

Document Type: Research Article


Affiliations: 1: College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, China 2: College of Pharmaceutical Sciences, Zhejiang University, 388 Yuhangtang Road, Hangzhou, Zhejiang, 310058, China, Email:

Publication date: 2007-03-01

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  • Pharmazie is a leading journal in the field of pharmaceutical sciences. As a peer-reviewed scientific journal, Pharmazie is regularly indexed in the relevant databases like Web of science, Journal Citation Reports and many others. The journal is open for submissions from the whole spectrum of pharnaceutical sciences including Pharmaceutical Chemistry, Experimental and Clinical Pharmacology, Drug Analysis, Pharmaceutics, Pharmaceutical Biology, Clinical Pharmacy etc.
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