Gasoline in arson samples
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Filtro SPME Polidimetilsiloxano (PDMS)
100 μm PDMS, Fused Silica (1 cm), needle size 24 ga, Manual Holder, pk of 3, red hubCONDITIONS
SPME fiber
polydimethylsiloxane phase fiber, 100 μm headspace sampling (20 min) 10 sec desorption (splitless mode) (57300-U)
column
100% methyl polysiloxane, 30 m × 0.25 mm I.D., 0.25 μm (Supelco equivalent, Equity-1, 28046-U)
oven
35 °C (2 min) to 220 °C at 10 °C/min, hold 2 min, to 300 °C at 30 °C/min, hold 5 min
inj. temp.
splitless (closed 3 min), 220 °C (2 mm I.D. injector liner)
detector
FID, 300 °C
carrier gas
helium, 1 mL/min (split 50:1)