Air Monitoring: New Advances in Sampling and Detection

Figure 12

Extracted-ion 117 for carbon tetrachloride from a 200 mL sample of semi-rural ambient air, analysed by TD-GC/MS (TD-100, Markes International Ltd), using a quadrupole mass spectrometer (full scan, blue; SIM, red) and a TOF mass spectrometer (black—BenchTOF-dx ALMSCO International Ltd, UK). Signal-to-noise ratios are shown for each detection method. Note that quadrupole in full scan did not detect this compound. Method conditions are shown in Table 11.