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  • Characterization of Volatile Sulfur Compounds in Moutai Liquors by Headspace Solid-Phase Microextraction Gas Chromatography-Pulsed Flame Photometric Detection and Odor Activity Value.

Characterization of Volatile Sulfur Compounds in Moutai Liquors by Headspace Solid-Phase Microextraction Gas Chromatography-Pulsed Flame Photometric Detection and Odor Activity Value.

Journal of food science (2017-11-14)
Shuang Chen, Sha Sha, Michael Qian, Yan Xu
RESUMEN

This study investigated the aroma contribution of volatile sulfur compounds (VSCs) in Moutai liquors. The VSCs were analyzed using headspace solid-phase microextraction-gas chromatography-pulsed flame photometric detection (HS-SPME-GC-PFPD). The influences of SPME fibers, ethanol content in the sample, pre-incubation time, and extraction temperature and time on the extraction of VSCs were optimized. The VSCs were optimally extracted using a divinylbenzene/carboxen/polydimethylsiloxane fiber, by incubating 10 mL diluted Chinese liquor (5% vol.) with 3 g NaCl at 30 °C for 15 min, followed by a subsequent extraction for 40 min at 30 °C. The optimized method was further validated. A total of 13 VSCs were identified and quantified in Moutai liquors. The aroma contribution of these VSCs were evaluated by their odor activity values (OAVs), with the result that 7 of 13 VSCs had OAVs > 1. In particular, 2-furfurylthiol, methanethiol, dimethyl trisulfide, ethanethiol, and methional had relatively high OAVs and could be the key aroma contributors to Moutai liquors. In this study, a method for analyzing volatile sulfur compounds in Chinese liquors has been developed. This method will allow an in-depth study the aroma contribution of volatile sulfur compounds in Chinese liquors. Seven volatile sulfur compounds were identified as potential key aroma contributors for Moutai liquors, which can help to the quality control of Moutai liquors.

MATERIALES
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Supelco
Fibra de divinilbenceno/carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, needle size 24 ga, for use with manual holder
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Fibra de divinilbenceno/carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, needle size 24 ga, StableFlex
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Fibra de divinilbenceno/carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, needle size 23 ga, StableFlex, for use with autosampler
Supelco
Fibra de divinilbenceno/carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, needle size 23 ga, StableFlex, for use with manual holder or autosampler, fiber L 2 cm
Supelco
Fibra de divinilbenceno/carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, needle size 24 ga, StableFlex, for use with autosampler
Supelco
ORBO 90 Carboxen® 564 (20/45) 160/80 mg, W,F,F separators, O.D. × L 6 mm × 75 mm, pkg of 25 ea, for analyte group MEK (methylethyl ketone)
Supelco
Filtro SPME Polidimetilsiloxano (PDMS), df 100 μm(PDMS, needle size 24 ga, for use with manual holder
Supelco
Filtro SPME Polidimetilsiloxano (PDMS), df 100 μm(PDMS, for use with autosampler, needle size 23 ga
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Carboxen® Adsorbent, matrix Carboxen® 1000, 60-80 mesh, bottle of 10 g
Supelco
ORBO-78 400/200 MG PK/25, W,W,W separators, O.D. × L 6 mm × 110 mm, pkg of 25 ea
Supelco
Filtro SPME Polidimetilsiloxano (PDMS), df 100 μm(PDMS, for use with autosampler, needle size 24 ga
Supelco
Columna capilar para GC Carboxen®-1010 PLOT, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
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Fibra de carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, df 75 μm(CAR/PDMS, for use with manual holder, needle size 24 ga
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SPME fiber assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, StableFlex, for use with autosampler
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Columna capilar para GC Carboxen®-1006 PLOT, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
Supelco
Fibra de carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, df 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler
Supelco
Fibra de carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, df 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler
Supelco
Fibra de carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, df 85 μm(CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler
Supelco
SPME fiber assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, for use with manual holder
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SPME fiber assembly polyacrylate (PA), df 85 μm(PA, for use with autosampler, needle size 23 ga
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Columna capilar para GC Carboxen®-1010 PLOT, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
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SPME fiber assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 23 ga, PDMS/DVB StableFlex, for use with autosampler
Supelco
Fibra de carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, df 85 μm(CAR/PDMS, needle size 24 ga, for use with manual holder, StableFlex fiber
Supelco
SPME fiber assembly polyacrylate (PA), df 85 μm(PA, for use with autosampler, needle size 24 ga
Sigma-Aldrich
Ethyl 3-(methylthio)propionate, ≥99%, FCC, FG
Supelco
SPME fiber assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, StableFlex, for use with manual holder
Supelco
Filtro SPME Polidimetilsiloxano (PDMS), df 100 μm(PDMS, for use with manual holder, needle size 23 ga
Supelco
Fibra de carboxeno/polidimetilsiloxano (DVB/CAR/PDMS) de SPME, df 75 μm(CAR/PDMS, needle size 23 ga, for use with autosampler
Supelco
SPME fiber assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, for use with autosampler
Supelco
SPME fiber assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm(PDMS/DVB, for use with autosampler, needle size 23 ga