US EPA Method OLM04.2 VOA: GC Analysis of Volatiles on SPB^®-624 after Purge & Trap using "K" Trap, Fast GC Analysis

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

124 mL/min. at 210 °C for 2 min.

bake

260 °C for 10 min

transfer line/valve temp.

110 °C

column

SPB-624, 20 m × 0.18 mm I.D., 1.0 μm (28662-U)

oven

40 °C (1 min), 11 °C/min to 125 °C, 35 °C/min to 230 °C (2 min)

inj. temp.

150 °C

MSD interface

200 °C

scan range

m/z = 35-400

carrier gas

helium, 1.2 mL/min

injection

100:1 split

liner

0.75 mm I.D. SPME