GC Analysis of Trace Odors in Drinking Water on Equity-5 after SPME using 50/30 μm DVB/Carboxen/PDMS Fiber

sample/matrix

25 mL of water containing 25% NaCl and drinking water odors kit (47529-U)

SPME fiber

2 cm StableFlex coated with 50/30 μm DVB/Carboxen/PDMS (57348-U)

extraction

headspace, 65 °C (30 min)

desorption process

3 min at 260 °C

column

Equity-5, 30 m × 0.25 mm, 0.25 μm (28089-U)

oven

60 °C (2 min) to 200 °C at 8 °C/min

flow rate

helium, 37 cm/sec @ 60 °C (1 mL/min constant flow)

inj. temp.

SPME fiber, splitless opened at after 1 min at 50 mL/min

detector

MS, selected ions (SIM) 95, 112, 124, 137, 197; interface at 280 °C

liner

0.75 mm SPME liner