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- W3013375163 abstract "In this study, a quantitative 1H NMR method (1H-qNMR) for determining the contents of imperatorin, byakangelicin, and oxypeucedanin in A. dahurica in traditional Chinese medicine (TCM) has been established. Dried plant material was extracted exhaustively with methanol by an ultrasonication-assisted extraction method. The 1H-qNMR measurements were performed on a 600 -MHz spectrometer with hydroquinone as the internal standard reference in deuterated dimethyl sulfoxide (DMSO-d6) solvent. Quantification was carried out using the 1H resonance signals at 6.55 ppm for hydroquinone and 7.68, 7.38-7.39, and 6.38-6.39 ppm for imperatorin, byakangelicin, and oxypeucedanin, respectively. The linearity, limit of detection (LOD), limit of quantitation (LOQ), precision, reproducibility, stability, and recovery of the methodology were evaluated, and results were good. The newly developed method has been applied to determine the three coumarins in A. dahurica." @default.
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- W3013375163 date "2020-03-24" @default.
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- W3013375163 title "Simultaneous Determination of Three Coumarins in <i>Angelica dahurica</i> by <sup>1</sup>H-qNMR Method: A Fast and Validated Method for Crude Drug Quality Control" @default.
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- W3013375163 doi "https://doi.org/10.1155/2020/8987560" @default.
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