Quantitative determination of atenolol in dried blood spot samples by LC-HRMS: A potential method for assessing medication adherence

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dc.contributor.author Lawson, Graham en
dc.contributor.author Cocks, Elizabeth en
dc.contributor.author Tanna, Sangeeta en
dc.date.accessioned 2012-05-08T11:04:26Z
dc.date.available 2012-05-08T11:04:26Z
dc.date.issued 2012-04-16
dc.identifier.citation Lawson, G. Cock, E. Tanna, S. (2012) Quantitative determination of atenolol in dried blood spot samples by LC-HRMS: A potential method for assessing medication adherence. Journal of Chromatography B 897, pp. 72-79 en
dc.identifier.uri http://hdl.handle.net/2086/6002
dc.description.abstract The use of blood spot collection cards was investigated as a means of obtaining small volume samples for the quantification of therapeutic drugs for assessing medication adherence. A liquid chromatography-high resolution TOF mass spectrometry (LC-HRMS) method, based on the measurement at the accurate mass to charge ratio of the target analyte, was used to ensure specificity for atenolol in the dried blood spot (DBS) samples. A working method was developed and validated. For the preparation of DBS samples whole blood spiked with analyte was used to produce 30µl blood spots on specimen collection cards. A 5mm disc was cut from the dried blood spot and extracted using methanol: water (60:40, v/v) containing the internal standard, atenolol-d7. Extracts were vortexed, sonicated and then centrifuged. Gradient chromatographic elution was achieved using an Ascentis Express C18 100 x 2.1mm column and a mobile phase flow rate of 0.2ml/min and the column oven temperature at 30°C. MS detection was carried out in electrospray positive ion mode for target ions at accurate mass m/z 267.1703 for atenolol and 274.2143 for the IS. Drug extraction efficiency from spiked blood spots was demonstrated to be 96± 5% and the drug was stable in DBS for at least 10 weeks. The developed LC-HRMS method was linear within the tested calibration range of 25-1500ng/ml and validation showed the accuracy (relative error) and precision (coefficient of variation) values were within the pre-defined limits of ≤15% at all concentrations with a limit of quantification of 25ng/ml. Factors with potential to affect drug quantification measurements such as the matrix effects, volume of blood applied onto the collection card and effect of different sampling cards were investigated. The developed LC-HRMS method was applied to blood spots on sampling card taken from adult healthy volunteers previously administered a 50mg atenolol tablet and a DBS concentration-time profile was obtained for atenolol. Requiring only a micro volume (30µl) blood sample for analysis, the developed DBS based assay has the potential to assess patient adherence to atenolol. en
dc.language.iso en en
dc.publisher Elsevier en
dc.subject dried blood spot (DBS) en
dc.subject atenolol en
dc.subject accurate mass en
dc.subject LC-HRMS en
dc.subject adherence en
dc.subject compliance en
dc.subject cardiovascular disease en
dc.subject Guthrie card en
dc.title Quantitative determination of atenolol in dried blood spot samples by LC-HRMS: A potential method for assessing medication adherence en
dc.type Article en
dc.identifier.doi http://dx.doi.org/10.1016/j.jchromb.2012.04.013
dc.researchgroup Pharmacy Practice en
dc.peerreviewed Yes en
dc.ref2014.selected 1365591152_1110680244430_3_3


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