Volatile compounds by US EPA Method 624

sample/matrix

20 ppb each component in 5 mL water (25381)

purge trap

VOCARB 3000 (21066-U)

purge

35 mL/min for 11 min

dry purge

3 min

desorption temp.

250 °C for 4 min

bake

260 °C for 10 min

column

VOCOL^®
, 60 m × 0.53 mm I.D.,3.0 μm (25381)

oven

35 °C (4 min), 6 °C/min to 200 °C

scan range

m/z 35-260 at 0.6 sec/scan

carrier gas

helium, 7.5 mL/min