Analysis of Organophosphorus-Based Nerve Agent Degradation Products by Gas Chromatography-Mass Spectrometry (GC-MS): Current Derivatization Reactions in the Analytical Chemist’s To...

por Valdez, Carlos A., Leif, Roald N.
Publicado 2021

Carbene-based Difluoromethylation of Bisphenols: Application to the Instantaneous Tagging of Bisphenol A in Spiked Soil for Its Detection and Identification by Electron Ionization...

por Valdez, Carlos A., Leif, Roald N., Hok, Saphon
Publicado 2019

An Efficient, Optimized Synthesis of Fentanyl and Related Analogs

por Valdez, Carlos A., Leif, Roald N., Mayer, Brian P.
Publicado 2014

Trimethyloxonium-mediated methylation strategies for the rapid and simultaneous analysis of chlorinated phenols in various soils by electron impact gas chromatography–mass spectrom...

por Valdez, Carlos A., Salazar, Edmund P., Leif, Roald N.
Publicado 2022

Benzyl trichloroacetimidates as derivatizing agents for phosphonic acids related to nerve agents by EI-GC-MS during OPCW proficiency test scenarios

por Subramanian, Alagu, Rosales, José A., Leif, Roald N., Valdez, Carlos A.
Publicado 2022

Rhodotorula taiwanensis MD1149 produces hypoacetylated PEFA compounds with increased surface activity compared to Rhodotorula babjevae MD1169

por Lyman, Mathew, Rubinfeld, Bonnee, Leif, Roald, Mulcahy, Heather, Dugan, Lawrence, Souza, Brian
Publicado 2018

Analysis, identification and confirmation of synthetic opioids using chloroformate chemistry: Retrospective detection of fentanyl and acetylfentanyl in urine and plasma samples by...

por Valdez, Carlos A., Leif, Roald N., Corzett, Todd H., Dreyer, Mark L.
Publicado 2022

Structural modification of fentanyls for their retrospective identification by gas chromatographic analysis using chloroformate chemistry

por Valdez, Carlos A., Leif, Roald N., Sanner, Robert D., Corzett, Todd H., Dreyer, Mark L., Mason, Katelyn E.
Publicado 2021