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Effect of drying on essential oil and colour of Alpinia galanga

Effect of drying on essential oil and colour of Alpinia galanga

Journal of Essential Oil Bearing Plants 5(3): 162-168

The rhizomes of Alpinia galanga were dried (at 40 degrees C) by convective, microwave-convective or infrared drying. The essential oils from both fresh and dried samples were analysed and identified. 1,8-cineole was the major compound in the essential oil of A. galanga and drying most effectively increased its concentration from 23.13% in fresh samples to 40.17% (convective drying), 38.34% (microwave-convective drying) and 39.56% (infrared drying).

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