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- W2362743359 abstract "AIM To develop a sensitive and accurate method for the determination of four sesquiterpene alkaloids in Tripterygium wilfordii hook.F.extracts by high-performance liquid chromatography coupled with mass spectrometry (LC/MS).METHODS After the sesquiterpene alkaloids in Tripterygium wilfordii hook.F.extracts were dissolved by chloroform and extracted by hydrochloric acid solution(2.0 mol·L~(-1)),the sample was cleaned by solid-phase extraction (SPE) using Oasis MCX cartridges.The separation was performed on a Zorbax SB C_(18) column(250 mm×4.6 mm,5μm)using the mobile phase consisting of 0.05%(V/V) acetic acid-ammonium acetate(5 mmol·L~(-1))/acetonitrile(45/ 55,V/V).Detection was carried out by a positive atmospheric pressure chemical ionization mass spectrometry(APCI- MS) in the selected ion monitoring(SIM) mode with the protonated molecular ions m/z 874[M + H]~+,m/z 884 [M + H]~+,m/z 858[M + H]~+ and m/z 868[M + H]~+ for wilfortrine,wilfordine,wilforgine and wilforine,respectively. RESULTS Calibration curve was linear within the range of 1.0 - 200.0μg·L~(-1),and the extraction recoveries were from 86.5%to 96.0%.The intra-day RSD were less than 7.4%,the inter-day RSD were less than 9.3%,and the limits of quantification were 1.0μg·kg~(-1) for the four sesquiterpene alkaloids.CONCLUSION This method is found to be simple,sensitive,little interferential and can be used for the determination of the sesquiterpene alkaloids in Tripterygium wilfordii hook.F.extracts." @default.
- W2362743359 created "2016-06-24" @default.
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- W2362743359 date "2011-01-01" @default.
- W2362743359 modified "2023-09-25" @default.
- W2362743359 title "Determination of four sesquiterpene alkaloids in Tripterygium wilfordii hook.F.extracts by liquid chromatography coupled with mass spectrometry" @default.
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