GC Analysis of Parabens on SLB^®-5ms after SPME using 50/30 μm DVB/Carboxen/PDMS Fiber

sample/matrix

parabens, each at 200 ppb in 3 mL water + 25% sodium chloride in a 4 mL vial

SPME fiber

metal fiber assembly coated with 50/30 μm DVB/Carboxen/PDMS (57912-U)

extraction

immersion with stirring, 25 °C (15 min)

desorption process

260 °C, 2 min

column

SLB-5ms, 20 m × 0.18 mm I.D., 0.36 μm (28576-U)

oven

60 °C (2 min), 15 °C/min to 300 °C (5 min)

MSD interface

275 °C

scan range

m/z 40-450

carrier gas

helium, 0.7 mL/min constant

liner

0.75 mm I.D. SPME