Air Monitoring: New Advances in Sampling and Detection

Table 8

Sampling and analytical conditions.

TD conditions	GC conditions	MS conditions
Configuration: TD-100 for automated tube desorption (Markes International Ltd); Flow path temperature: 150°C; Cold trap: air toxics analyser type trap; Trapping temperature: 25°C; Cold trap desorption: 300°C for 3 min (10 : 1 split); Trap heating rate: 40°C/s	Column: 60 m × 0.32 mm × 1.8 μm, 624 type phase; Oven: 40°C (5 min), 5°C/min to 230°C (0 min); Constant pressure: 10 psi	Source temperature: 230°C; Quadrupole temperature: 150°C; Transfer line temperature: 280°C; Scan range: m/z 33–350

Sampling: Sample 1 (black trace): 1 L of sample pumped onto multi-bed tubes using a constant-flow pump at 100 mL/min for 10 min; Sample 2 (blue trace): 1 L sampled onto a multi-bed tube, using ten pulls of a piston pump set at 100 mL per pull.