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Merck
  • Yield effects on 2-methoxy-3-isobutylpyrazine concentration in cabernet sauvignon using a solid phase microextraction gas chromatography/mass spectrometry method.

Yield effects on 2-methoxy-3-isobutylpyrazine concentration in cabernet sauvignon using a solid phase microextraction gas chromatography/mass spectrometry method.

Journal of agricultural and food chemistry (2004-08-19)
Dawn M Chapman, John H Thorngate, Mark A Matthews, Jean-Xavier Guinard, Susan E Ebeler
摘要

A rapid and automated solid phase microextraction (SPME) stable isotope dilution gas chromatography/mass spectrometry (GC-MS) method for 2-methoxy-3-isobutylpyrazine (MIBP) quantification in red wine was developed. Wines with 30% (w/v) NaCl and 2-methoxy-(2)H(3)-3-isobutylpyrazine internal standard were sampled with a 2 cm divinylbenzene/carboxen/poly(dimethylsiloxane) SPME fiber for 30 min at 40 degrees C and analyzed by GC-MS. The method was used to measure MIBP concentrations in Cabernet Sauvignon wines that were produced from six winter pruning treatments over two vintages. MIBP concentrations were significantly negatively correlated with buds per vine. In addition, the MIBP concentration was directly related to sensory vegetal intensity ratings obtained by descriptive analysis.

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Supelco
SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), needle size 24 ga, for use with manual holder
Supelco
SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), needle size 24 ga, StableFlex
Supelco
SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with autosampler
Supelco
SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with manual holder or autosampler, fiber L 2 cm
Supelco
SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), needle size 24 ga, StableFlex, for use with autosampler
Supelco
ORBO Carboxen-564 管, W,F,F separators, O.D. × L 6 mm × 75 mm, pkg of 25 ea, for analyte group MEK (methylethyl ketone)
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Carbopack®吸附剂, matrix Carboxen® 1000, 60-80 mesh, bottle of 10 g
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ORBO-78 400/200mg,每包 25 支, W,W,W separators, O.D. × L 6 mm × 110 mm, pkg of 25 ea
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Carboxen®1010 多孔层壁涂开管柱, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
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SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 75 μm(CAR/PDMS, for use with manual holder, needle size 24 ga
Supelco
Carboxen® 1006 多孔层壁涂开管柱, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
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SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler
Supelco
SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler
Supelco
SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler
Supelco
Carboxen®1010 多孔层壁涂开管柱, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
Sigma-Aldrich
2-异丁基-3-甲氧基吡嗪, ≥99%, FG
Supelco
SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, for use with manual holder, StableFlex fiber
Supelco
SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with autosampler
Supelco
2-异丁基-3-甲氧基吡嗪 溶液, certified reference material
Sigma-Aldrich
2-异丁基-3-甲氧基吡嗪, 99%
Supelco
SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with manual holder
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Carbopack®吸附剂, matrix Carboxen® 572, 20-45 mesh, bottle of 10 g
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Carboxen® 1006 多孔层壁涂开管柱, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
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Tenax® TA/Carboxen® 1018, glass TD tube, preconditioned, O.D. × L 1/4 in. × 3 1/2 in., Sealed with (Swagelok® End-Fittings), pkg of 10 ea
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Carboxen® 1000 双向固相萃取管, 200 mg/mL, pk 30
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SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), for use with autosampler, needle size 23 ga, metal alloy fiber, fiber L 2 cm
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Carbopack®吸附剂, matrix Carboxen® 1000, 40-60 mesh, bottle of 50 g
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Carbopack®吸附剂, matrix Carboxen® 569, 20-45 mesh, bottle of 10 g
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ORBO-93吸附管, ORBO tube I.D. × L 6 mm × 95 mm, Bed A 180 mg, Bed B 90 mg, 60/80 mesh, pkg of 25 ea