US EPA Method 624: GC Analysis of Volatiles on VOCOL^® (30 m x 0.53 mm I.D.) after Purge & Trap using "K" Trap

sample/matrix

20 ppb each component in 5 mL water (25320-U)

purge trap

VOCARB 3000 (21066-U)

purge

40 mL/min for 11 min

dry purge

3 min

desorption temp.

250 °C for 4 min

bake

280 °C for 10 min

column

VOCOL^®
, 30 m × 0.53 mm I.D., 3.0 μm (25320-U)

oven

5 °C (2 min), 5 °C/min to 200 °C

scan range

m/z 35-260 at 0.6 sec/scan

carrier gas

helium, 7.5 mL/min