The present project was undertaken to evaluate the quality of ginger rhizomes imported from China and Thailand, on the basis of their essential oil content and composition. Essential oil of two ginger rhizomes imported from China and Thailand was extracted by hydro distillation. Essential oil content was found to be 0.98 (China) and 1.58% (Thailand). Chemical analysis of essential oil was carried out by GC-FID. Essential oil of Thailand ginger sample contained α-pinene 3.59, α-phallendrene 2.84, myrecene 4.58, β-pinene 0.74, γ-terpinene 2.49, 1, 8-cineol 3.87, citral 5.39 and zingibrene 30.81%. Essential oil of China ginger sample contains α-pinene 0.305, α-phallendrene 1.02, myrecene 4.82, γ-terpinene 2.88, 1, 8-cineol 2.4, α-terpinene 6.5, citral 4.5 and zingibrene 8.0%. Ginger sample from Thailand was found to be better in quality due to higher percentage of essential oil (60%).
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Misbah Sultan, Haq Nawaz Bhatti and Zafar Iqbal, 2005. Chemical Analysis of Essential Oil of Ginger (Zingiber officinale). Pakistan Journal of Biological Sciences, 8: 1576-1578.
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