Automated DBS Extraction Prior to Hilic/RP LC-MS/MS Target Screening of Drugs

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Serval ID
serval:BIB_9184E25923F3
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Automated DBS Extraction Prior to Hilic/RP LC-MS/MS Target Screening of Drugs
Journal
Chromatographia
Author(s)
Versace F., Deglon J., Lauer E., Mangin P., Staub C.
ISSN
0009-5893
ISSN-L
0009-5893
Publication state
Published
Issued date
2013
Peer-reviewed
Oui
Volume
76
Number
19-20, SI
Pages
1281-1293
Language
english
Abstract
This article describes a rapid LC-MS/MS target screening method based on an automated extraction of 5 mu L dried blood spots (DBS), two 5 min chromatographic runs on orthogonal phase columns (RP and Hilic) and a data dependent acquisition (DDA) of product ions spectra for the reliable identification of the detected compounds. The extraction step was performed in 2 min by using the LC autosampler itself in 96-well plates. This procedure was evaluated using 22 model compounds frequently encountered in forensic investigations, i.e., cocaine, benzodiazepines, amphetamines, opioids, antidepressants and antipsychotics. These investigations showed that even if the extraction step was reduced to a minimum, the extraction recoveries were satisfactory (median value of 40 %) and allowed for the detection of the model compounds in their therapeutic ranges, with the exception of morphine. Moreover, the use of two different chromatographic columns broadened the number of screening targets to those that behaved poorly under RP conditions, such as amphetamines or glucuronides, while keeping chromatographic gradients very short. This procedure was applied to 34 authentic post-mortem cases. It allowed the detection of 89 % of the compounds that were quantified in the routine procedures and the formal identification of 77 % of the compounds using their product ions spectra. These results were considered more than satisfactory compared to routine screening alone (GC-MS and LC-DAD, 55 % compound identification). The method described in this article is therefore a powerful approach for a fast, reliable and efficient target screening of drugs in forensic and clinical investigations.
Keywords
Biochemical Research Methods, Chemistry, Analytical
Web of science
Open Access
Yes
Create date
09/08/2016 16:51
Last modification date
01/10/2019 7:18
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