GC Analysis of Multiple Pesticides on SLB®-5ms after SPME using 60 μm Carbowax® Fiber
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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
Pesticides at 10 ppb in 0.1M phosphate buffer, pH 7, 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
column
SLB-5ms, 30 m x 0.25 mm I.D., 0.5μm film
desorption process
2 min. at 250°C, splitless for 0.75 min. then opened
oven
60°C(1 min) to 150°C @ 25°C/min to 230°C @ 5°C/min to 310°C @ 18°C/min (3 min)
inj. temp.
Splitless/split with 0.75mm ID liner and Merlin Microseal
detector
ITMS m/z=60-450 @ 0.9 μsec per scan, transfer line 310°C
carrier gas
Helium, 1mL/min constant flow
Descrizione
Note legali
Carbowax is a registered trademark of Union Carbide
SLB is a registered trademark of Merck KGaA, Darmstadt, Germany