US EPA法 OLM04.2 VOA: GCによる揮発性物質の分析、VOCOL^®、Purge & Trap処理、"K" Trap使用 [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

150 mL/min at 210 °C for 2 min

bake

260 °C for 10 min

transfer line/valve temp.

110 °C

column

VOCOL, 20 m × 0.18 mm I.D., 1.0 μm (28463-U)

oven

40 °C (0.8 min), 19 °C/min to 125 °C, 32 °C/min to 220 °C (1 min)

inj. temp.

150 °C

MSD interface

200 °C

scan range

m/z = 35-400

carrier gas

helium, 1.4 mL/min

injection

100:1 split

liner

0.75 mm I.D. SPME