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- W2428546043 abstract "The study aims to establish a quantitative nuclear magnetic resonance (QNMR) method for the determination of the absolute content of bosentan. Proton nuclear magnetic resonance spectroscopy [1H NMR] spectra were obtained in CDCl3 with the internal standard dimethyl terephthalate and zg30 pulse sequence by using a Bruker AVANCE II 400 spectrometer. The content of bosentan is determined with QNMR in comparison with the result obtained by mass balance method. The result is 96.25% by QNMR and 96.54% by mass balance method. A rapid and accurate QNMR method has been established for the quantitative determination of the absolute content of bosentan. The study provides a new way for the quality control and calibration of a new reference standard material, it could be the complementary with the mass balance method for the assay of standard reference." @default.
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- W2428546043 date "2014-02-01" @default.
- W2428546043 modified "2023-09-27" @default.
- W2428546043 title "[Quantitative determination of bosentan by proton nuclear magnetic resonance with internal standard method]." @default.
- W2428546043 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24761617" @default.
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