Research Topics
| Marc A LeBeauSummaryAffiliation: Federal Bureau of Investigation Country: USA Publications
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Detail Information
Publications
The identification of mivacurium and metabolites in biological samplesMadeline A Montgomery
Federal Bureau of Investigation Laboratory, 2501 Investigation Parkway, Quantico, Virginia 22135, USA
J Anal Toxicol 29:637-42. 2005..This method has been used to analyze dozens of forensic samples, including clinical specimens from living patients, as well as autopsy specimens from exhumed bodies...
Guidance for improved detection of drugs used to facilitate crimesMarc A LeBeau
Federal Bureau of Investigation, FBI Laboratory, Quantico, VA 22135, USA
Ther Drug Monit 30:229-33. 2008..This article provides information on the manner in which drug-facilitated crimes occur, the drugs that are used to commit these crimes, and recommendations to improve the detection of these drugs through toxicologic analyses...- The role of variations in growth rate and sample collection on interpreting results of segmental analyses of hairMarc A LeBeau
U S Federal Bureau of Investigation, Laboratory Division, 2501 Investigation Pkwy, Quantico, VA 22135, USA
Forensic Sci Int 210:110-6. 2011..The results of this study suggest that the variability in the growth rate of human head hair, as well as the inconsistent collection of hair, significantly affect the interpretation of results from segmental analysis of hair... - Further evidence of in vitro production of gamma-hydroxybutyrate (GHB) in urine samplesMarc A LeBeau
Chemistry Unit, FBI Laboratory, Federal Bureau of Investigation, 2501 Investigation Parkway, Quantico, VA 22135, United States
Forensic Sci Int 169:152-6. 2007..This potential for an artificial increase in GHB concentration must be appreciated when establishing the threshold between endogenous and exogenous concentrations of GHB... - A comprehensive study on the variations in urinary concentrations of endogenous gamma-hydroxybutyrate (GHB)Marc A LeBeau
Chemistry Unit, FBI Laboratory, Federal Bureau of Investigation, 2501 Investigation Parkway, Quantico, VA 22135, USA
J Anal Toxicol 30:98-105. 2006..The results of this study will aid the interpretation of low GHB concentrations measured in urine samples, particularly in investigations of drug-facilitated crimes... - An automated SPE/LC/MS/MS method for the analysis of cocaine and metabolites in whole bloodEshwar Jagerdeo
Federal Bureau of Investigation Laboratory, 2501 Investigation Parkway, Quantico, VA 22135, United States
J Chromatogr B Analyt Technol Biomed Life Sci 874:15-20. 2008..The bias and precision were determined using a simple analysis of variance (ANOVA: single factor). The results demonstrate bias as <7%, and %precision as <9% for all components at each QC level... - Qualitative identification of doxacurium and its breakdown products in postmortem fluids by liquid chromatography-tandem mass spectrometryMadeline A Montgomery
Chemistry Unit, Federal Bureau of Investigation Laboratory, 2501 Investigation Parkway, Quantico, VA 22135, USA
J Anal Toxicol 30:57-60. 2006..This procedure was used to analyze heart blood, cerebrospinal fluid, and bile specimens from the decedent. Doxacurium and its breakdown products were identified in all three specimens... - A semi-automated solid-phase extraction liquid chromatography/tandem mass spectrometry method for the analysis of tetrahydrocannabinol and metabolites in whole bloodEshwar Jagerdeo
Federal Bureau of Investigation Laboratory, Quantico, VA 22135, USA
Rapid Commun Mass Spectrom 23:2697-705. 2009..The bias and imprecision were determined using a simple analysis of variance (ANOVA: single factor). The results demonstrate bias as <7%, and imprecision as <9%, for all components at each quantity control level... - Ethanol analysis from biological samples by dual rail robotic autosamplerCynthia L Morris Kukoski
Federal Bureau of Investigation Laboratory, Quantico, VA, USA
J Chromatogr B Analyt Technol Biomed Life Sci 850:230-5. 2007..This method demonstrated acceptable linearity from 0 to 1500 mg/dL. The lower limit of quantitation (LOQ) was determined to be 17 mg/dL and the limit of detection was 5 mg/dL... - Rapid analysis of cocaine and metabolites in urine using a completely automated solid-phase extraction-high-performance liquid chromatography-tandem mass spectrometry methodEshwar Jagerdeo
Federal Bureau of Investigation Laboratory, Quantico, Virginia 22135, USA
J Anal Toxicol 32:570-6. 2008..The bias and precision were determined using a simple analysis of variance (ANOVA: single factor). The results demonstrated bias as < 5% and % precision as < 9% for all components at each QC level... - Intra- and interindividual variations in urinary concentrations of endogenous gamma-hydroxybutyrateMarc A LeBeau
Chemistry Unit, FBI Laboratory, Federal Bureau of Investigation, Washington, DC 20535, USA
J Anal Toxicol 26:340-6. 2002..Patients with such a deficiency should be readily identifiable through prominent symptoms, repeated urinalysis, or genetic testing... - LETTER TO THE EDITOR: Considerations on the Utility of Hair Analysis for CocaineMarc A LeBeau
Federal Bureau of Investigation, Laboratory Division, Quantico, Virginia
J Anal Toxicol 33:343-4. 2009..Their findings suggest that cocaine is incorporated into human hair via exterior contamination in concentrations that mimic the amounts found in the hair of cocaine users...