GC Analysis of Closely Eluting Analytes from US EPA Method 8270 on SLB-5ms (30 m x 0.53 mm I.D., 0.50 μm)

carrier gas

helium, 30 cm/sec @ 200 °C, set using methane

column

SLB-5ms, 30 m x 0.53 mm I.D., 0.50 μm (28541-U)

detector

FID, 330 °C

inj. temp.

250 °C

injection

0.5 μL, splitless (0.75 min)

liner

4 mm I.D., single taper

oven

40 °C (2 min), 22 °C/min to 240 °C, 10 °C/min to 330 °C (1 min)

sample

50 ng on-column of a 72 component semivolatile standard and 8 surrogate compounds, plus 6 internal standards (at 40 ng on-column), in methylene chloride