Water sample screened for BTEX and other compounds

sample/matrix

0.7 mL water spiked with 2-600 μg/liter each analyte, 0.25 g NaCl added

SPME fiber

30 μm PDMS (57309)

extraction

headspace, 12 sec (no stirring), ambient temp.

desorption process

2-3 min, 250 °C (0.75-1.0 mm I.D. inj. port liner)

column

Equity-1, 10 m × 0.20 mm I.D., 1.2 μm (available on request)

oven

70 °C (0.2 min) to 180 °C at 50 °C/min

detector

FID, 250 °C