||Mass Spectrometric Quantification of Polychlorinated Biphenyl Congeners Using Multiple Carbon-13 Internal Standards.
Shore, F. L. ;
Martin, J. D. ;
Williams, L. R. ;
||Environmental Monitoring Systems Lab., Las Vegas, NV. ;Lockheed Engineering and Management Services Co., Inc., Las Vegas, NV.
Spectrochemical analysis ;
Chlorine organic compounds ;
Mass spectrometry ;
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Multiple carbon-13 internal standards improve the precision and accuracy of the mass spectrometric analysis of polychlorinatedbiphenyl (PCB) congeners compared to analyses using a single carbon-13 internal standard. The mean percentage error in PCB congener analysis on the micrograms g-1 level using multiple ion detection and three carbon-13 internal standards was 6.29 percent. This precision in single laboratory work suggests that the method will be useful for interlaboratory studies monitoring PCB residues and contaminants of public health significance.