Article

Study of the Essential Oil Composition of Cumin Seeds by an Amino Ethyl-Functionalized Nanoporous SPME Fiber

Chromatographia (Impact Factor: 1.37). 10/2009; 70(7):1147-1151. DOI: 10.1365/s10337-009-1269-7

ABSTRACT An ultrasound assisted SPME method with a new nanoporous SBA-15 fiber functionalized with 3-[bis(2-hydroxyethyl)amino]propyl-triethoxysilane
was successfully applied to the study of the essential oil composition of cumin (Cuminum cyminum L.) seeds. The sample was irradiated by ultrasound radiation and its volatile components were collected by the fiber from
the sample headspace and directly injected into a GC-MS injection port for analysis. A simplex method was used for optimization
of four different parameters affecting the efficiency of the extraction. Under the optimized conditions (i.e. sample weight,
0.6g; temperature, 70°C; sonication time, 12min and extraction time, 28min), the number of components identified by the
proposed method and their amounts were identical to those of a hydrodistillation technique. The extraction efficiency of the
SBA-15 fiber was superior to a PDMS commercial fiber. The major components identified were p-menta-1,3-dien-7-al, cuminaldehyde, γ-terpinene and p-cymene, respectively. The proposed method was applied to a comparative study of the essential oil composition of cumin in
three different climate conditions of the Lorestan province in Iran. The results indicated that the essential oils in the
temperate and tropical locations were 94.0 and 85.6% of the cold region, respectively.

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Available from: Payman Hashemi, May 30, 2015
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