GC Analysis of Semivolatiles on SLB®-5ms after SPME using 60 μm Carbowax® Fiber
Materiali
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Gruppo fibre SPME, rivestimento in glicole polietilenico (PEG) Carbowax
60 μm PEG, Metal Alloy (1 cm), needle size 23 ga, Autosampler, pk of 3, purple hubCONDITIONS
sample/matrix
Base neutral analytes at 50 ppb and internal standards 25 ppb in 0.1M phosphate buffer, pH 11, with 25% NaCl, 9 mL in 10 mL screw cap vial
SPME fiber
60 μm Carbowax (PEG) (57354-U)
extraction
30 min. direct immersion with agitation using CombiPal autosampler
desorption process
2 min at 250°C, splitless for 0.75 min then opened
column
SLB-5ms, 30 m x 0.25 mm I.D., 0.5μm film
oven
50°C(2 min) to 130°C @ 12°C/min to 200°C @ 20°C/min to 260°C @ 15°C/min to 310°C @ 20°C/min (4 min)
inj. temp.
Splitless/split with 0.75mm ID liner and Merlin Microseal
detector
ITMS m/z=50-230 @ 0.65 μsec per scan, transfer line 310°C
carrier gas
Helium, 1mL/min constant flow, 8.7 psi
Descrizione
Note legali
Carbowax is a registered trademark of Union Carbide
SLB is a registered trademark of Merck KGaA, Darmstadt, Germany