US EPA Method 8260: GC Analysis of Volatiles on SPB^®-624 after Purge & Trap using "K" Trap

sample/matrix

each analyte at 50 ppb in 5 mL water

purge trap

PURGE TRAP K, O.I. ANALYTICAL 4560 (24940-U)

purge

40 mL/min at 25 °C for 11 min

dry purge

2 min

desorption preheat

205 °C

desorption process

210 °C for 2 min, 31 mL/min

bake

260 °C for 10 min

transfer line/valve temp.

110 °C

column

SPB-624, 30 m x 0.25 mm I.D., 1.4 μm (24255)

oven

40 °C (2 min), 7 °C/min to 135 °C, 30 °C/min to 230 °C (3 min)

inj. temp.

150 °C

MSD interface

200 °C

scan range

m/z = 35-350

carrier gas

helium, 1.2 mL/min

injection

30:1 split

liner

0.75 mm I.D. SPME