Determination of Limonene Oxidation Products Using SPME and GC

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Published:Journal of Chromatographic Science, ISSN 0021-9665Volume 41, Number 1, January 2003, pp. 31-35

Determination of Limonene Oxidation Products Using SPME and GC–MS

Susan Sonchik Marine* and Jason Clemons
Miami University Middletown, 4200 E. University Blvd., Middletown, OH 45005

Limonene is a common component found in consumer goods ranging from beverages to cleaning compounds. Limonene oxidation products, however, have a less desirable flavor and fragrance. Early detection of limonene oxide formation would aid quality control. A method is developed to determine the concentration of limonene oxide in essential oils and beverages using solid-phase microextraction (SPME). A headspace sampling technique is used to reduce or eliminate the presence of less volatile components. Several different SPME fibers are tested, varying in polymer thickness, polymer cross-linking and bonding, and polarity of the polymer. For each fiber tested, the sampling time is optimized for reproducible results. The 7-µm-thick bonded poly(dimethylsiloxane) fiber provides the best results. External standards are used for quantitation.

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