Polychlorinated biphenyls plots

Not all of these isomers are completely separated by the conditions given here, but all arc readily detected by plotting the masses of the molecular ions. Pesticides can interfere with polychlorinated biphenyl (PCB) analysis. 

Pattern recognition studies on complex data from capillary gas chromatographic analyses were conducted with a series of microcomputer programs based on principal components (SIMCA-3B). Principal components sample score plots provide a means to assess sample similarity. The behavior of analytes in samples can be evaluated from variable loading plots derived from principal components calculations. A complex data set was derived from isomer specific polychlorinated biphenyl (PCBS) analyses of samples from laboratory and field studies. 

Figure 22. Log-log plot of equilibrium weight change of homogeneous nonbonded protective garment material following immersion in a polychlorinated biphenyl...

Figure 16.2. Bi-plots showing the first two principal components of relative individual polychlorinated biphenyl (PCB) congener profiles in seafood in relation to congener profiles for Aroclor mixtures 1221, 1232, 1242, 1248, 1254, 1260, and 1262.

Fig. 4. Scatter plots of total polychlorinated biphenyl (ZPCB) versus (a) coprostanol and (b) XLAB concentrations in surficial sediments from study site. Lines and statistics for linear regression analysis are shown (modified from Eganhouse and Sherblom, 2001).

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