title: Fast Simultaneous Determination of 13 Nucleosides and Nucleobases in Cordyceps sinensis by UHPLC-ESI-MS/MS.
abstract: A reliable ultra-high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry (UHPLC-ESI-MS/MS) method for the fast simultaneous determination of 13 nucleosides and nucleobases in Cordyceps sinensis (C. sinensis) with 2-chloroadenosine as internal standard was developed and validated. Samples were ultrasonically extracted in an ice bath thrice, and the optimum analyte separation was performed on an ACQUITY UPLC(TM) HSS C18 column (100 mm × 2.1 mm, 1.8 μm) with gradient elution. All targeted analytes were separated in 5.5 min. Furthermore, all calibration curves showed good linear regression (r > 0.9970) within the test ranges, and the limits of quantitation and detection of the 13 analytes were less than 150 and 75 ng/mL, respectively. The relative standard deviations (RSDs) of intra- and inter-day precisions were <6.23%. Recoveries of the quantified analytes ranged within 85.3%-117.3%, with RSD < 6.18%. The developed UHPLC-ESI-MS/MS method was successfully applied to determine nucleosides and nucleobases in 11 batches of C. sinensis samples from different regions in China. The range for the total content in the analyzed samples was 1329-2057 µg/g.
authors.affiliation: School of Pharmacy, Shanghai University of Traditional Chinese Medicine, No. 1200 Cailun Road, Pudong New District, Shanghai 201203, China. pashanhan@163.com.|Experimental Center of Teaching and Learning, Shanghai University of Traditional Chinese Medicine, No. 1200 Cailun Road, Pudong New District, Shanghai 201203, China. pashanhan@163.com.
authors.forename: Shi-Yu
authors.initials: SY
authors.lastname: Zong
authors.affiliation: Experimental Center of Teaching and Learning, Shanghai University of Traditional Chinese Medicine, No. 1200 Cailun Road, Pudong New District, Shanghai 201203, China. pashanhan@163.com.
authors.forename: Han
authors.initials: H
authors.lastname: Han
authors.affiliation: School of Pharmacy, Shanghai University of Traditional Chinese Medicine, No. 1200 Cailun Road, Pudong New District, Shanghai 201203, China. annabel_cn@163.com.|Experimental Center of Teaching and Learning, Shanghai University of Traditional Chinese Medicine, No. 1200 Cailun Road, Pudong New District, Shanghai 201203, China. annabel_cn@163.com.
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.affiliation: Division of Life Science and Center for Chinese Medicine, The Hong Kong University of Science and Technology, Clear Water Bay Road, Hong Kong, China. mailtolining@gmail.com.
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.affiliation: Division of Life Science and Center for Chinese Medicine, The Hong Kong University of Science and Technology, Clear Water Bay Road, Hong Kong, China. botina@ust.hk.
authors.forename: Tina Ting-Xia
authors.initials: TT
authors.lastname: Dong
authors.affiliation: School of Pharmacy, Shanghai University of Traditional Chinese Medicine, No. 1200 Cailun Road, Pudong New District, Shanghai 201203, China. zhangtdmj@hotmail.com.|Experimental Center of Teaching and Learning, Shanghai University of Traditional Chinese Medicine, No. 1200 Cailun Road, Pudong New District, Shanghai 201203, China. zhangtdmj@hotmail.com.
authors.forename: Tong
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Division of Life Science and Center for Chinese Medicine, The Hong Kong University of Science and Technology, Clear Water Bay Road, Hong Kong, China. botsim@ust.hk.
authors.forename: Karl W K
authors.initials: KW
authors.lastname: Tsim
mesh_terms: D002138:Calibration; D002851:Chromatography, High Pressure Liquid; D032661:Cordyceps / Q000737:chemistry; D057230:Limit of Detection; D009705:Nucleosides / Q000737:chemistry / Q000302:isolation & purification*; D011743:Pyrimidines / Q000737:chemistry / Q000302:isolation & purification; D021241:Spectrometry, Mass, Electrospray Ionization; D053719:Tandem Mass Spectrometry
chemical_list: D009705:Nucleosides; D011743:Pyrimidines
keywords: Cordyceps sinensis; UHPLC–ESI–MS/MS; nucleobases; nucleosides