US EPA Method 8015 (modified): GC Analysis of Gasoline Range Organics (GRO) on Equity-1 after Purge & Trap using "M" Trap

sample/matrix

Each analyte at 50 ppb in 5 mL of water

purge trap

MOD BTEXTRAP M, Tekmar^® 3000

purge

40 mL/min at 25 °C for 11 min

dry purge

2 min

desorption preheat

220 °C

bake

260 °C for 10 min

transfer line/valve temp.

110 °C

column

Equity-1, 30 m x 0.32 mm I.D., 1.0 μm (28057-U)

oven

40 °C (2 min), 5 °C/min to 75 °C, 10 °C/min to 200 °C

inj. temp.

200 °C

detector

FID, 250 °C

carrier gas

helium, 1.4 mL/min constant

injection

20:1 split

liner

0.75 mm I.D. SPME