Validated analytical methodology for the simultaneous determination of a wide range of pesticides in human blood using GC–MS/MS and LC–ESI/MS/MS and its application in two poisoning cases

Abstract Pesticides are frequently responsible for human poisoning and often the information on the involved substance is lacking. The great variety of pesticides that could be responsible for intoxication makes necessary the development of powerful and versatile analytical methodologies, which allo...

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Bibliographic Details
Published in:Science & justice 2015-09, Vol.55 (5), p.307-315
Main Authors: Luzardo, Octavio P, Almeida-González, Maira, Ruiz-Suárez, Norberto, Zumbado, Manuel, Henríquez-Hernández, Luis A, Meilán, María José, Camacho, María, Boada, Luis D
Format: Article
Language:English
Subjects:
Aged
Analytical chemistry
Chromatography
Chromatography, Liquid
Extraction processes
Female
Forensic science
Forensic Toxicology
Gas Chromatography-Mass Spectrometry
GC–MS/MS
Hematology
Homicide
Humans
LC–MS/MS
Male
Mass spectrometry
Middle Aged
Multiresidue
Pathology
Pesticide poisoning
Pesticides
Pesticides - blood
Pesticides - poisoning
Poisoning - diagnosis
Suicide
Tandem Mass Spectrometry
Toxicology
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Summary:Abstract Pesticides are frequently responsible for human poisoning and often the information on the involved substance is lacking. The great variety of pesticides that could be responsible for intoxication makes necessary the development of powerful and versatile analytical methodologies, which allows the identification of the unknown toxic substance. Here we developed a methodology for simultaneous identification and quantification in human blood of 109 highly toxic pesticides. The application of this analytical scheme would help in minimizing the cost of this type of chemical identification, maximizing the chances of identifying the pesticide involved. In the methodology that we present here, we use a liquid–liquid extraction, followed by one single purification step, and quantitation of analytes by a combination of liquid and gas chromatography, both coupled to triple quadrupole mass spectrometry, which is operated in the mode of multiple reaction monitoring. The methodology has been fully validated, and its applicability has been demonstrated in two recent cases involving one self-poisoning fatality and one non-fatal homicidal attempt.
ISSN:1355-0306
1876-4452
DOI:10.1016/j.scijus.2015.04.007