US EPA Method 8260: GC Analysis of Volatiles on VOCOL^® after Purge & Trap using "K" Trap

sample/matrix

each analyte at 50 ppb in 5 mL water

purge trap

VOCARB 3000 “K”

purge

40 mL/min at 25 °C for 11 min

dry purge

2 min

desorption preheat

205 °C

desorption process

40 mL/min at 210 °C for 2 min

bake

260 °C for 10 min

transfer line/valve temp.

110 °C

column

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

oven

40 °C (2 min), 7 °C/min to 125 °C, 12 °C/min to 220 °C (5 min)

inj. temp.

150 °C

MSD interface

200 °C

scan range

m/z = 35-400

carrier gas

helium, 0.7 mL/min

injection

30:1 split

liner

0.75 mm I.D. SPME