The responses of selected‐ion monitoring of electron impact mass spectra and selected‐
reagent‐ion chemical ionization mass spectra of polychlorinated biphenyls (PCBs), relative …

A quadrupole ion trap mass spectrometer coupled with a gas chromatograph was used to
study the reactions of two co-eluting polychlorinated biphenyl (PCB) compounds, congener …

The H2 and CH4 chemical ionization (Cl) mass spectra of selected polychlorinated biphenyl
isomers (PCBs) have been studied In detall. The H2 Cl mass spectra are shown to pro-vide …

Positive Ion chemical ionization GC/MS was evaluated for the quantitation of
polychloroblphenyls (PCBs) using 10 or less selected PCB standards. Positive Ion chemical …

GCMS techniques using chemical ionization have been em-ployed to characterize by
molecular weight composition, five FDA reference Aroclor standards. The results Indicated …

Four tetrachlorinated bipbenyls were chlorinated with 35Cl2 to yield seventeen
polychlorinated biphenyls (PCBs) substituted once or twice with chlorine enriched in 35Cl …

Methane chemical ionization (CI)-selected ion monitoring (SIM) mass spectrometry was
used to identify and conclusively distinguish 19 organochlorine pesticides from …

The versatility and sensitivity of the quadrupole ion trap tandem mass spectrometer has
been applied to the determination of polychlorodibenzo‐p‐dioxins (PCDDs) and …

In time-programmed limited mass scan gas chromatography—mass spectrometry, discrete
portions of the mass range are selected to monitor the presence of characteristic groups of …

Correlationbse tween molecular structure and fragmentation observed in electron capture
negative chemical ionization mass spectra (moderator gas= methane) of 49 selected …