Xiaona Dong

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In this study, a sensitive, selective and reproducible liquid chromatography-tandem mass spectrometry method for the simultaneous determination of 1,5-dicaffeoylquinic acid (1,5-DCQA) and its active metabolites, 1-caffeoyl-5-feruoylquinic acid and 1,5-O-diferuoylquinic acid, in human plasma, using puerarin as internal standard, was developed and validated.(More)
A method using a wedge-plate shear shifting system with adjustable accuracy and measuring range is proposed for measuring the focus shifting caused by thermal distortion in a single-shot laser system. Two beam splitter groups are used in this method to precisely split a single beam into multiple beams with different optical path difference. The focus(More)
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