Automated procedures for mass spectrometric determination of polychlorinated biphenyls as isomer groups

Complete characterization of polychlorinated biphenyl congeners in commercial Aroclor and Clophen mixtures by multidimensional gas chromatography-electron capture detection

“…The present results identify the relevant congeners to be analyzed in environmental samples by single or multidimensional GC-ECD. They may also be useful for the application of automated GC analysis, as has recently been proposed (16,18,19), and for selecting individual CBs for measurement in environmental samples (20)…”

Characterization of polychlorinated biphenyl isomers in Sovol and trichlorodiphenyl formulations by high-resolution gas chromatography with electron capture detection and high-resolution gas chromatography-mass spectrometry techniques

“…These eight individual PCBs were used for calibration of the MS response to compounds of technical mixtures eluted from a GC column. One isomer from each level of chlorination (from 2 to 7) was used to calibrate the MS RRFs to all isomers in that group (22). Data shown in Table II provide distinguishing characteristic features for each of these formulations and three Aroclors for comparison.…”

Analysis of Polychlorinated Biphenyl Mixtures and Establishment of a Parameter Useful for PCB‐Degradation Studies

“…680 was taken as an alternative (USEPA 1985). The methods selection referring to PCBs, described in detail by Slivon et al (1985), uses a quantification by external calibration with nine selected congeners together with perdeuterated Chrysen (Chrysen-d 12 ) as the internal standard. The choice of the congeners for calibration and the internal standard, which results from the group response factor, has been described by Gebhart et al (1985).…”