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Title: Development and validation of a sensitive UPLC-MS/MS method for the analysis of narcotic analgesics in urine and whole blood in forensic context
Authors: Verplaetse, Ruth ×
Tytgat, Jan #
Issue Date: Feb-2011
Publisher: Elsevier
Series Title: Forensic Science International vol:215 issue:1-3 pages:136-145
Abstract: Narcotic analgesics are widely (ab) used and sometimes only occur in low concentrations in biological samples. Therefore, a highly sensitive liquid chromatography tandem mass spectrometry method was developed for simultaneous analysis of 9 narcotic analgesics and metabolites (buprenorphine, O-desmethyltramadol, fentanyl, norbuprenorphine, norfentanyl, pethidine, piritramide, tilidine and tramadol) in urine and whole blood. Sample preparation was performed on a mixed-mode cation exchange solid phase extraction cartridge with an additional alkaline wash step to decrease matrix effects and thus increase sensitivity. Ionization with electrospray ionization was found to be more efficient than atmospheric pressure chemical ionization. The use of a mobile phase of high pH resulted in higher electrospray ionization signals than the conventional low pH mobile phases. In the final method, gradient elution with 10mM ammonium bicarbonate (pH 9) and methanol was performed on a small particle column (Acquity C18, 1.7μm, 2.1mm×50mm). Selectivity, matrix effects, recovery, linearity, sensitivity, precision, accuracy and stability were validated in urine and whole blood. All parameters were successfully evaluated and the method showed very high sensitivity, which was the major aim of this study. The applicability of the method was demonstrated by analysis of several forensic cases involving narcotic analgesics.
URI: 
ISSN: 0379-0738
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Toxicology and Pharmacology
× corresponding author
# (joint) last author

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