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Standard Methods 6040D: GC Analysis of Geosmin and 2-MIB on SLB®-5ms after SPME using 50/30 μm DVB/Carboxen/PDMS Fiber

Standard Methods 6040D: GC Analysis of Geosmin and 2-MIB on SLB®-5ms after SPME using 50/30 μm DVB/Carboxen/PDMS Fiber suitable for GC, application for SPME

Materiali

Colonna analitica

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Colonna GC capillare SLB®-5ms

L × I.D. 30 m × 0.25 mm, df 0.25 μm

Fibra per SPME

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Gruppo in fibra SPME divinilbenzene/carbossene/polidimetilsilossano (DVB/CAR/PDMS)

for use with autosampler, needle size 23 ga, metal alloy fiber, fiber L 2 cm

CONDITIONS

SPME fiber

2 cm Metal coated with 50/30 μm DVB/Carboxen/PDMS (57914-U)

extraction

headspace, 65 °C (30 min)

desorption process

260 °C for 3 min.

column

SLB-5ms, 30 m x 0.25 mm I.D., 0.25 μm (28471-U)

oven

60 °C (2 min), 8 °C/min to 200 °C

MSD interface

300 °C

scan range

SIM, m/z = 137, 124, 95, 112

carrier gas

helium, 1 mL/min constant

liner

0.75 mm I.D., SPME

sample

20/10 ppt odor compounds in 25 mL water + 25% NaCl

Descrizione

Note legali

SLB is a registered trademark of Merck KGaA, Darmstadt, Germany