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  • Title: Investigation of an LC-MS-MS (QTrap) method for the rapid screening and identification of drugs in postmortem toxicology whole blood samples.
    Author: Herrin GL, McCurdy HH, Wall WH.
    Journal: J Anal Toxicol; 2005 Oct; 29(7):599-606. PubMed ID: 16419388.
    Abstract:
    The QTrap liquid chromatography-tandem mass spectrometry (LC-MS-MS) by Applied Biosystems was investigated as an adjund to enzyme immunoassay (EIA) for the rapid detection of drugs in blood. Thus, a procedure used to identify drugs in whole blood by EIA was extended to LC-MS-MS analysis. A multiple reaction monitoring (MRM) database of over 100 drugs was constructed to analyze for those drugs commonly observed in postmortem toxicology cases. The QTrap method provided for a scan time of only 2.8 s to produce both an MRM and an enhanced product ion scan. Various validation and developmental steps of the method are presented, as well as a concordance study as a final means of validation. This study was conducted to compare the effectiveness of the QTrap versus conventional extraction methods and gas chromatography-MS for the identification of drugs in 95 postmortem samples. The more than 400 drug results in this study showed 100% concordance between the two techniques.
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