Abstract:

An automatic thermal desorption-gas chromatography-mass spectrometric (ATD-GC-MS) system was applied to analyze the volatile composition of the fresh flowers of Plumeria rubra Linn. cv. Acutifolia based on dynamic head-space closed cyclic adsorption sampling. The quantification of volatile compounds was carried out using area normalization method. The sum of the relative contents of identified volatile compounds in the fresh flowers of Plumeria rubra Linn. cv. Acutifolia was 77.31%, and among them, aldehydes were the most predominant group of compounds, with a relative content of 29.5%, followed by oximes (24.99%), derivatives of aldehydes, and nitriles (5.34%), alkanes (3.68%), aromatic hydrocarbons (1.42%), ethers (4.64%), terpenes (6.67%) and alcohols (1.67%) were also included. Besides some of the identified aldehydes, the compounds responsible for the characteristic aroma of Plumeria rubra Linn. cv. Acutifolia flowers also consist of limonene belonging to the group of terpenes and phenyl ethanol belonging to the group of alcohols.

Key words: Plumeria rubra Linn.cv.Acutifolia, volatile, automatic thermal-desorption gas chromatography-mass spectrometry (ATD-GC-MS)