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  • Comparison of two SPME fibers for the extraction of some off-flavor cork-taint compounds in bottled wines investigated by GC-HRMS.

Comparison of two SPME fibers for the extraction of some off-flavor cork-taint compounds in bottled wines investigated by GC-HRMS.

Analytical and bioanalytical chemistry (2009-02-05)
Giuliana Bianco, Giuseppe Novario, Rosalia Zianni, Tommaso R I Cataldi
ABSTRACT

Headspace solid-phase microextraction (HS-SPME) coupled to gas chromatography with high-resolution mass spectrometry (GC-HRMS) was used to determine 2,4,6-trichloroanisole, 2,3,6-trichloroanisole, 2,3,4-trichloroanisole, 2,3,5,6-tetrachloroanisole, pentachloroanisole, 2,4,6-tribromoanisole, 2-methylisoborneol, and 4-ethylguaiacol in wine samples. Two types of fiber coating commonly employed for sampling trichloroanisoles in wine and cork stoppers, viz. a polar mixed 50/30 microm divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) and a nonpolar 100 microm polydimethylsiloxane (PDMS), both 1 cm in length, were compared. This study demonstrates that the most employed polar mixed fiber should not be used with ethanol-water solutions, viz. wine samples, as its coating is not chemically and mechanically robust for sample extractions, as confirmed by environmental scanning electron microscopy. Much more effective and reliable results were obtained with the PDMS fiber, which remained functional for more than 80 analyses of red and white wine samples with satisfactory extraction efficiencies. Detection limits of investigated compounds, under optimized experimental conditions, ranged from 0.2 to 0.4 ng/L at a signal-to-noise ratio of 3 and quantification limits from 0.8 to 1.5 ng/L. The proposed method was successfully applied to commercially available Italian white and red wines using 2,4,6-TCA-d(5) as the internal standard.

MATERIALS
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Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, for use with manual holder
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Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler
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Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with autosampler
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Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with manual holder or autosampler, fiber L 2 cm
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Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex
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Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex, for use with autosampler
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Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, for use with manual holder, needle size 24 ga
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4 L
Estimated to ship on March 22, 2025
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Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with autosampler
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Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler
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Supelco
Carboxen® Adsorbent, matrix Carboxen® 1000, 40-60 mesh, bottle of 50 g
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Carboxen®-1006 PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
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SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler
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Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, for use with manual holder, StableFlex fiber
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Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with manual holder
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Carboxen®-1006 PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
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Estimated to ship on March 22, 2025
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Carboxen® Adsorbent, matrix Carboxen® 564, 20-45 mesh, pack of 144 × 290 mg
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Carboxen® Adsorbent, matrix Carboxen® 572, 20-45 mesh, bottle of 10 g
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Carboxen® Adsorbent, matrix Carboxen® 564, 20-45 mesh, bottle of 10 g
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Carboxen® Adsorbent, matrix Carboxen® 1003, 40-60 mesh, bottle of 10 g
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Carboxen® Adsorbent, matrix Carboxen® 1000, 60-80 mesh, bottle of 10 g
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4 L
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Carboxen®-1010 PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
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Estimated to ship on March 22, 2025
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Carboxen® Adsorbent, matrix Carboxen® 563, 20-45 mesh, bottle of 10 g
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4 L
Estimated to ship on March 22, 2025
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Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), for use with autosampler, needle size 23 ga, metal alloy fiber, fiber L 2 cm
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SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, for use with autosampler, needle size 23 ga, metal alloy fiber
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SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), for use with autosampler, needle size 23 ga, metal alloy fiber, fiber L 1 cm
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Carboxen® Adsorbent, matrix Carboxen® 569, 20-45 mesh, bottle of 500 g
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Carboxen® 1000 Reversible SPE Tube, 200 mg/mL, pk 30
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ORBO-93 Sorbent Tube, ORBO tube I.D. × L 6 mm × 95 mm, Bed A 180 mg, Bed B 90 mg, 60/80 mesh, pkg of 25 ea
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Carboxen®-1010 PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
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Carboxen® Adsorbent, matrix Carboxen® 569, 20-45 mesh, bottle of 10 g
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