Influence of extraction procedure on the aroma composition of Thymus zygis L. and Mentha pulegium L.

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作者
Moldao-Martins, M [1 ]
Trigo, R [1 ]
Nolasco, MA [1 ]
Gil, MGB [1 ]
da Costa, MLB [1 ]
机构
[1] Inst Super Agron, P-1399 Lisbon, Portugal
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TS2 [食品工业];
学科分类号
0832 ;
摘要
The present work compares the results of two extraction procedures (Clevenger distillation and compressed CO2 extraction) on the yield and composition of the aromatic extracts. A RSM was applied in order to determine the best extraction conditions by compressed CO2. The matrix was established for the following ranges: time 60-180 min, temperature 40-50 degrees C and pressure 9-20 MPa. All the extracts were analysed by GC and GCMS. The results showed that the yields are generally higher for compressed CO2: 2.1% for Mentha pulegium and about 3% for Thymus, compared to a value of 0.9% and 1% by distillation. The main compound found in M. pulegium is pulegeone. In T. zygis the main compounds are thymol, geraniol and geranyl acetate.
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页码:133 / 141
页数:9
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