Organic pollutants chromatograms

Figure 2.21 shows the on-line extraction gas chromatogram of 2.25 ml of water spiked at 5 ppb levels with 14 different organic pollutants (40). In this case, the authors concluded that wall-coated open tubular traps (thick-film polysiloxane phases) can be used for the on-line extraction of organic compounds from water. However, when using swelling agents such as pentane, non-polar analytes can be trapped quantitatively, while for more polar compounds chloroform is the most suitable solvent. 

Figure 5.3. GC-MS analysis of organic pollutants in a sample of natural water, (a) Total ion current chromatogram (b) reconstructed ion current chromatogram (c) mass chromatogram based on the ion m/z 149 current.

Figure 5.9. GC-MS analysis of organic pollutants in natural water (Pegasus III instrument, LECO). (a) Six-seconds segment of TIC chromatogram, (b) Mass chromatograms, reconstructed by software and based on the current of ions of m/z 59, 64, 173, 49, 158, 99, and 93.

FIGURE 7. Gas chromatogram of the organic extract obtained from the water sample polluted with oily products. 

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