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GC Analysis of Trichloroanisole (TCA) and Precursors on SLB®-5ms after SPME using 100 μm a PDMS Fiber

GC Analysis of Trichloroanisole (TCA) and Precursors on SLB®-5ms after SPME using 100 μm a PDMS Fiber suitable for GC, application for SPME

Materiales

analytical column

Referencia del producto
Descripción
Precios

SLB®-5ms Capillary GC Column

L × I.D. 30 m × 0.25 mm, df 0.25 μm

SPME fiber

Referencia del producto
Descripción
Precios

Portafibra SPME

for use with manual sampling

Portafibra SPME

for use with CTC CombiPAL and Gerstel MPS2

Filtro SPME Polidimetilsiloxano (PDMS)

metal alloy fiber, df 100 μm(PDMS, needle size 23 ga, for use with autosampler

standard

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Descripción
Precios

2,4,6-Trichlorophenol

PESTANAL®, analytical standard

2,4,6-Trichloroanisole

PESTANAL®, analytical standard

Pentachlorophenol

analytical standard

CONDITIONS

sample/matrix

each analyte at 100 ng/L in a 12% ethanol solution

SPME fiber

metal fiber coated with 100 μm PDMS (57928-U)

extraction

headspace, 50 °C for 30 min, with stirring

desorption process

250 °C for 3 min

column

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

oven

50 °C (1 min), 25 °C/min to 280 °C

inj. temp.

250 °C

detector

GC/MS, ECD, 290 °C

carrier gas

helium, 1.5 mL/min, constant

injection

splitless/split, closed 2 min

liner

0.75 mm I.D. SPME

sample

Wine cork

Descripción

Analysis Note

2,4,6-Trichloroanisole (TCA) is a phenolic compound that, if present, gives wine an unpleasant odor often described as musty, woody, dank, and acrid. Human sensory thresholds for TCA are very low, estimated to be approximately 5 parts per trillion. Natural phenolic compounds in cork can convert into TCA when the cork is exposed to chlorine-containing bleach. TCA contamination can also derive from fungi growing on the grapes during fermentation. In this application, a 100 μm PDMS fiber was used to extract TCA from the headspace above a spiked wine sample prior to analysis by GC. The SLB-5ms GC columns provide consistently low-bleed, inert, efficient, and durable separations.

Legal Information

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