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Thermal decomposition of two synthetic glycosides by TG, DSC and simultaneous Py-GC-MS analysis

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Abstract

To develop thermal stable flavor, two glycosidic bound flavor precursors, geranyl-tetraacetyl-β-D-glucopyranoside (GLY-A) and geranyl-β-D-glucopyranoside (GLY-B) were synthesized by the modified Koenigs–Knorr reaction. The thermal decomposition process and pyrolysis products of the two glycosides were extensively investigated by thermogravimetry (TG), differential scanning calorimeter (DSC) and on-line pyrolysis-gas chromatography mass spectroscopy (Py-GC-MS). TG showed the T p of GLY-A and GLY-B were 254.6 and 275.7°C. The T peak of GLY-A and GLY-B measured by DSC were 254.8 and 262.1°C respectively.

Py-GC-MS was used for the simply qualitative analysis of the pyrolysis products at 300 and 400°C. The results indicated that: 1) A large amount of geraniol and few by-products were produced at 300°C, the by-products were significantly increased at 400°C; 2) The characteristic pyrolysis product was geraniol; 3) The primary decomposition reaction was the cleavage of O-glycosidic bound of the two glycosides flavor precursors. The study on the thermal behavior and pyrolysis products of the two glycosides showed that this kind of flavor precursors could be used for providing the foodstuff with specific flavor during heating process.

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Authors and Affiliations

  1. Key Laboratory of Food Science and Safety, Ministry of Education, Southern Yangtz University, Wuxi, China, 214036

    W.-C. Xie, X.-H. Gu & J. Tang

  2. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian, China, 116023

    Z.-C. Tan & L.-X. Sun

  3. Huabao Food Flavors and Fragrance Co. Ltd, Shanghai, China, 201821

    G.-Y. Wang & C.-R. Luo

Authors
  1. W.-C. Xie
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  2. X.-H. Gu
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  3. Z.-C. Tan
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  4. J. Tang
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  5. G.-Y. Wang
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  6. C.-R. Luo
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  7. L.-X. Sun
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Correspondence to Z.-C. Tan.

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Xie, WC., Gu, XH., Tan, ZC. et al. Thermal decomposition of two synthetic glycosides by TG, DSC and simultaneous Py-GC-MS analysis. J Therm Anal Calorim 87, 505–510 (2007). https://doi.org/10.1007/s10973-006-7617-z

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  • DOI: https://doi.org/10.1007/s10973-006-7617-z

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