• Publications
  • Influence
A contribution to the chemical profiling of 3,4-methylenedioxymethamphetamine (MDMA) tablets.
TLDR
A profiling method for the identification of impurities found in seized 3,4-methylenedioxymethamphetamine (MDMA) tablets is presented and possible application toward batch comparison of samples is discussed. Expand
Comparative chemical analyses of drug samples: general approach and application to heroin.
TLDR
The methodology used for the comparative chemical analyses of illicit drug seizures, and its application to a heroin comparison case, is described and allowed the determination of common batch samples with a high degree of certainty. Expand
Isotopic Analysis of13C as a Tool for Comparison and Origin Assignment of Seized Heroin Samples
The applicability of isotopic analysis of 13C for forensic purposes has been discussed in the case of heroin. The obtained results showed first that morphine acetylation induces an isotopicExpand
Peptide nucleic acid characterization by MALDI-TOF mass spectrometry.
Peptide nucleic acids (PNAs) are a new class of DNA mimics in which the regular nucleobases of adenine, thymine, cytosine, and guanine are connected via a peptide-like backbone. PNA molecules retainExpand
Application of quantitative chemometric analysis techniques to direct sampling mass spectrometry.
TLDR
Multivariate quantitative methods were found to be superior to univariate regression when a unique ion for quantitation could not be found and for prediction samples that contained unmodeled, interfering compounds, PARAFAC outperformed the other analysis methods. Expand
DNA typing of human leukocyte antigen sequence polymorphisms by peptide nucleic acid probes and MALDI-TOF mass spectrometry.
TLDR
A novel analytical method using PNA probes detected by matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOFMS) was applied to type sequence polymorphisms within the human leukocyte antigen, DQA locus, achieving Reproducible and accurate genotyping. Expand
Gas chromatography with mass spectrometry or isotope-ratio mass spectrometry in studying the geographical origin of heroin
Abstract Profile analysis of impurities associated with heroin samples and 13 C enrichment of heroin are studied in attempts to trace the origin of heroin samples in drug abuse. High-resolutionExpand
Analysis of amino acids in biological fluids by pentafluorobenzyl chloroformate derivatization and detection by electron capture negative ionization mass spectrometry.
Pentafluorobenzyl chloroformate (PFBCF) has been utilized as a derivatization reagent for amino acids (AAs) in biological fluids with susequent detection by electron capture negative ionization massExpand