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Graphite-based microextraction by packed sorbent for online extraction of beta-blockers from human plasma samples
Stockholm University, Faculty of Science, Department of Analytical Chemistry.
Stockholm University, Faculty of Science, Department of Analytical Chemistry.
Number of Authors: 3
2015 (English)In: Journal of chromatography. B, ISSN 1570-0232, E-ISSN 1873-376X, Vol. 992, 86-90 p.Article in journal (Refereed) Published
Abstract [en]

In the present work a new graphitic material (Carbon-XCOS) was used as a sorbent for microextraction by packed sorbent (MEPS).The beta-blockers metoprolol and acebutolol in plasma samples were extracted and detected online using Carbon-MEPS syringe and liquid chromatography and tandem mass spectrometry (LC-MS/MS). Factors affecting the MEPS performance such as conditioning, washing and elution solutions were investigated. The validation of the bioanalytical method was performed using human plasma. The standard curve ranged from 10 to 2000 nM and the lower limit of quantification (LLOQ) was set to 10 nM. The method validation showed good accuracy and precision for the quality control (QC) samples at three concentration levels (30, 800 and 1600 nM). The accuracy values of the QC samples were in the range of 86-108% (n = 18). The precision values of intra- and inter-day for QC samples ranged from 4.4% to 14.4% (RSD) for the both studied analytes. The coefficient of determination (R-2) values were >= 0.999 (n = 3).

Place, publisher, year, edition, pages
2015. Vol. 992, 86-90 p.
Keyword [en]
Graphitic sorbent, Microextraction by packed sorbent, beta-Blocker, Plasma samples
National Category
Biological Sciences Chemical Sciences
URN: urn:nbn:se:su:diva-118963DOI: 10.1016/j.jchromb.2015.04.027ISI: 000355709200012OAI: diva2:842724
Available from: 2015-07-22 Created: 2015-07-21 Last updated: 2015-07-22Bibliographically approved

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Abdel-Rehim, Mohamed
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