GC Analysis of Volatiles on VOCOL^® after SPME using 75 μm Carboxen/PDMS Fiber

sample/matrix

1 ppb each analyte in 3 mL water (25% NaCl added) in 4 mL vial

SPME fiber

Carboxen/PDMS, 75 μm (57318)

extraction

headspace, 40°C (20 min), with stirring

desorption process

5 min., 310 °C

column

VOCOL^®, 30 m × 0.25 mm I.D., 1.5 μm (24205-U)

oven

40°C (2 min) to 210°C at 8°C/min

detector

ion trap, MS, m/z = 45-260 (0.6sec/scan)

carrier gas

helium, 35 cm/sec

injection

splitless/split (closed 2 min), 0.75 mm I.D. liner