Captopril Determination in Dried Blood Spot Samples with LC-MS and LCHRMS: A Potential Method for Neonate Pharmacokinetic Studies

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dc.contributor.author Lawson, Graham en
dc.contributor.author Mulla, Hussain en
dc.contributor.author Tanna, Sangeeta en
dc.date.accessioned 2012-04-27T12:08:17Z
dc.date.available 2012-04-27T12:08:17Z
dc.date.issued 2012-03-07
dc.identifier.citation Lawson, G., Mulla, H., Tanna, S. (2012) Captopril Determination in Dried Blood Spot Samples with LC-MS and LC-HRMS: A Potential Method for Neonate Pharmacokinetic Studies. Journal of Bioanalysis and Biomedicine, 4 (2), pp. 16-25 en
dc.identifier.uri http://hdl.handle.net/2086/5980
dc.description.abstract The use of blood spot collection cards was investigated as a means of obtaining small volume samples for the analysis of therapeutic drugs for the purpose of neonatal pharmacokinetic studies. We describe the development of two micro-analytical methods for the determination of captopril extracted from dried blood spots (DBS). Firstly a liquid chromatography ion-trap mass spectrometry method with selected ion monitoring (LC-MS(SIM)) of target ion at m/z 218.0 was developed to determine captopril levels in 8mm discs punched from each DBS. This was compared in terms of specificity and sensitivity to a simple accurate mass liquid chromatography high resolution TOF mass spectrometry (LC-HRMS) method in which MS detection was carried out in electrospray positive ion mode for target ions at m/z 218.0845 for captopril and 377.2084 for the IS. Dithiothreitol was used both to pre-treat the sampling cards and as part of the extraction medium in order to stabilise the DBS extracted captopril. Drug extraction efficiency from spiked blood spots was demonstrated to be 90 ± 10% and the drug was stable in DBS for at least 12 weeks. Validation of both micro-analytical methods showed good precision and accuracy and the LC-HRMS method was linear within the tested calibration range 10-400ng/ml for captopril and had improved sensitivity and specificity compared to the LC-MS(SIM) method. This method was applied to blood spots on sampling card from a neonate patient previously administered 1mg/kg captopril orally. The amount of captopril in the DBS was 88ng/ml. Requiring only a micro volume (30µl) blood sample for analysis, the developed DBS based micro-analytical method has the potential to facilitate pharmacokinetic studies of captopril in children. en
dc.language.iso en en
dc.publisher OMICS Publishing Group en
dc.subject Dried blood spot (DBS) en
dc.subject Captopril en
dc.subject LC-MS en
dc.subject LC-HRMS en
dc.subject Guthrie card en
dc.subject Paediatric en
dc.subject Pharmacokinetics en
dc.subject Accurate mass en
dc.title Captopril Determination in Dried Blood Spot Samples with LC-MS and LCHRMS: A Potential Method for Neonate Pharmacokinetic Studies en
dc.type Article en
dc.identifier.doi http://dx.doi.org/10.4172/1948-593X.1000058
dc.researchgroup Pharmacy Practice en
dc.peerreviewed Yes en


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