کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1216250 1494163 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of procyanidins and their metabolites in plasma samples by improved liquid chromatography–tandem mass spectrometry
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Determination of procyanidins and their metabolites in plasma samples by improved liquid chromatography–tandem mass spectrometry
چکیده انگلیسی

An off-line solid-phase extraction (SPE) and ultra-performance liquid chromatography–tandem mass spectrometry (UPLC-MS/MS) method was developed and validated for determining procyanidins, catechin, epicatechin, dimer, and trimer in plasma samples. In the validation procedure of the analytical method, linearity, precision, accuracy, detection limits (LODs), quantification limits (LOQs), and the matrix effect were studied. Recoveries of the procyanidins were higher than 84%, except for the trimer, which was 65%. The LODs and LOQs were lower than 0.003 and 0.01 μM, respectively, for all the procyanidins studied, except for the trimers, which were 0.8 and 0.98 μM, respectively. This methodology was then applied for the analysis of rat plasma obtained 2 h after ingestion of grape seed phenolic extract. Monomers (catechin and epicatechin), dimer and trimer in their native form were detected and quantified in plasma samples, and their concentration ranged from 0.85 to 8.55 μM. Moreover, several metabolites, such as catechin and epicatechin glucuronide, catechin and epicatechin methyl glucuronide, and catechin and epicatechin methyl-sulphate were identified. These conjugated forms were quantified, in reference to the respective unconjugated form, showing concentrations between 0.06 and 23.90 μM.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography B - Volume 877, Issues 11–12, 15 April 2009, Pages 1169–1176
نویسندگان
, , , , , , ,