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

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

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 …

Materials and Methods Source of Standards. Seventy-seven PCB congeners were acquired
from Ultra Scientific, Inc., Hope, RI, and Analabs, North Haven, CT. The purity of these …

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

The gas chromatograph-mass spectrometer (GC/MS) system has become a powerful tool for
analysis of trace organic contaminants in environmental samples, largely because of the …

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 …

This report describes the utilization of gas-liquid chromatography coupled with chemical
ionization and electron impact mass spectrometry for the characterization and isomeric …