Liquid chromatography-electrospray ionization-tandem mass spectrometry for simultaneous analysis of chlorogenic acids and their metabolites in human plasma
| Autor: | Yuji Matsui, Yoshio Takasu, Ryuji Ochiai, Naoki Kondou, Shun Nakamura, Yoshinori Masukawa |
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| Rok vydání: | 2007 |
| Předmět: |
Adult
Male Spectrometry Mass Electrospray Ionization Electrospray Chromatography Molecular Structure Clinical Biochemistry Selected reaction monitoring Reproducibility of Results Cell Biology General Medicine Tandem mass spectrometry Mass spectrometry Biochemistry Analytical Chemistry Ferulic acid chemistry.chemical_compound chemistry Chlorogenic acid Tandem Mass Spectrometry Liquid chromatography–mass spectrometry Caffeic acid Humans Chlorogenic Acid Chromatography Liquid |
| Zdroj: | Journal of Chromatography B. 858:96-105 |
| ISSN: | 1570-0232 |
| DOI: | 10.1016/j.jchromb.2007.08.013 |
| Popis: | A method using liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) was developed for the simultaneous analysis of nine chlorogenic acids (CGAs), three isomers each of caffeoylquinic acids (CQAs), feruloylquinic acids (FQAs) and dicaffeoylquinic acids (dCQAs), and their two metabolites, caffeic acid (CA) and ferulic acid (FA), in human plasma. In simultaneous multiple reaction monitoring (MRM) measurements using ESI-MS/MS with a negative ion mode, a deprotonated molecular ion derived from each of the 11 molecules was used as a precursor ion while three diagnostic product ions characteristic for each were selected for the qualitative analysis. To obtain maximal intensities for all diagnostic product ions, the collision energy was optimized for each one. LC separation was achieved under conditions of a reversed-phase Inertsil ODS-2 column combined with a gradient elution system using 50mM acetic acid with 3% acetonitrile aqueous solution and 50 mM acetic acid with 100% acetonitrile. In the quantitative analysis, one of the three diagnostic product ions for each of the 11 molecules was selected. Application of simultaneous LC-ESI-MS/MS MRM measurements to analyze the 11 standards spiked into blank human plasma indicated that all diagnostic product ions were detected without any interference, and that the sensitivity, linearity and recovery of this method were acceptable. When using this method to analyze those 11 molecules in the plasma after oral ingestion of 250 ml of a drink containing a green coffee bean extract (300 mg CGAs), all 11 molecules were identified and CQAs, FQAs and FA were quantified. CQAs, FQAs and dCQAs in human plasma were detected for the first time. This method should be useful to understand the biological and pharmacological effects of CGAs, such as improvement of human hypertension. |
| Databáze: | OpenAIRE |
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