GC Analysis of Volatiles in Water on VOCOL after SPME using 100 μm PDMS Fiber

sample/matrix

50ppb each analyte in 1.8 mL saturated salt water

SPME fiber

polydimethylsiloxane, 100 μm film (57300-U)

extraction

5 min immersed in water with rapid stirring

desorption process

230 °C, splitless (closed 3 min)

column

VOCOL, 10 m × 0.20 mm I.D., 1.2 μm (24129-U)

oven

40 °C (0.75 min), 20 °C/min to 160 °C

detector

FID, 260 °C

carrier gas

helium, 40 cm/sec