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  • Study on the effects of rapid aging technology on the aroma quality of white tea using GC-MS combined with chemometrics: In comparison with natural aged and fresh white tea.

Study on the effects of rapid aging technology on the aroma quality of white tea using GC-MS combined with chemometrics: In comparison with natural aged and fresh white tea.

Food chemistry (2018-06-10)
Dandan Qi, Aiqing Miao, Junxi Cao, Wenwen Wang, Wei Chen, Shi Pang, Xiugu He, Chengying Ma
RÉSUMÉ

The effects of rapid aging technology on aroma compounds and characteristic of white tea were investigated in comparison with natural aged white tea (NAWT) and fresh white tea (FWT). Volatile compounds of white teas were extracted using headspace-solid phase microextraction (HS-SPME), and analyzed with gas-chromatography-mass spectrometry (GC-MS) coupled with chemometrics. Aroma metabolites analysis showed that 40 compounds were identified to distinguish rapid aged white tea (RAWT) from others. Principal component analysis (PCA), hierarchical cluster analysis (HCA), heatmap analysis and Venn diagram demonstrated that alcohols, aldehydes, ketones, esters, heterocyclics and alkanes exhibited significant variations. Quantitative descriptive analysis of white tea aroma showed that in RAWT, sweet and herbal aroma were significantly improved; whereas grassy green and delicate aroma declined sharply. This study provides a comprehensive investigation on aroma quality of RAWT, offering a potentially rapid way to produce aged white tea.

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Description du produit

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Fibres SPME Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, for use with manual holder
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Fibres SPME Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex
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Fibres SPME Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with autosampler
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Fibres SPME 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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Fibres SPME Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex, for use with autosampler
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Fibres SPME Polydimethylsiloxane (PDMS), df 100 μm(PDMS, needle size 24 ga, for use with manual holder
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Fibres SPME Polydimethylsiloxane (PDMS), df 100 μm(PDMS, for use with autosampler, needle size 23 ga
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Fibres SPME Polydimethylsiloxane (PDMS), df 100 μm(PDMS, for use with autosampler, needle size 24 ga
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Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, for use with manual holder, needle size 24 ga
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Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, StableFlex, for use with autosampler
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Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler
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Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler
Supelco
Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler
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Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, for use with manual holder
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Fibres SPME polyacrylate (PA), df 85 μm(PA, for use with autosampler, needle size 23 ga
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Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 23 ga, PDMS/DVB StableFlex, for use with autosampler
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Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, for use with manual holder, StableFlex fiber
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Fibres SPME polyacrylate (PA), df 85 μm(PA, for use with autosampler, needle size 24 ga
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Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, StableFlex, for use with manual holder
Sigma-Aldrich
2,4-Heptadienal, ≥88%
Supelco
Fibres SPME Polydimethylsiloxane (PDMS), df 100 μm(PDMS, for use with manual holder, needle size 23 ga
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Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with autosampler
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Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, for use with autosampler
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Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, for use with autosampler, needle size 23 ga
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SPME StableFlex fiber assortment kit, for use with manual holder
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SPME fiber assembly, Carbowax-Polyethylene Glycol (PEG) Coating, needle size 23 ga, df 60 μm(PEG, for use with autosampler
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Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with manual holder
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SPME StableFlex fiber assortment kit, needle size 23 ga, for use with autosampler
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Assortiment de fibres SPME 4, for use with manual holder, size 24 ga
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Fibres SPME polyacrylate (PA), df 85 μm(PA, for use with manual holder, needle size 24 ga