固相微萃取（SPME）

Direct analysis of nectar and floral volatile organic compounds in hybrid onions by HS-SPME/GC–MS: Relationship with pollination and seed production

由 ty10086 提交于 周四, 08/26/2021 - 13:28
Abstract(#br)In this study, a simple and solvent-free method using headspace solid-phase microextraction (SPME) and gas chromatography–mass spectrometry (GC–MS) was developed for determination of the volatile compounds from fresh flowers and nectar of male sterile and fertile lines of Allium cepa L. The SPME parameters were studied; the optimum conditions of 85\u003cce:hsp sp=\"0.25\"/\u003eμm carboxen/polydimethylsiloxane (CAR/PDMS), extraction temperature of 30\u003cce:hsp sp=\"0.25\"/\u003e°C and extraction time of 30\u003cce:hsp sp=\"0.25\"/\u003emin were obtained.

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Optimization of Headspace Sampling Using Solid Phase Microextraction For Volatile Organic Acids in Different Tobacco Types

由 ty10086 提交于 周四, 08/26/2021 - 12:50
Optimization of Headspace Sampling Using Solid Phase Microextraction For Volatile Organic Acids in Different Tobacco TypesSolid-phase microextraction(SPME);volatile organic acids;Selectivity;tobacco;adsorption efficiency;A Solid-phase micro extraction(SPME) was evaluated as a tool for headspace sampling of tobacco samples. Several experimental parameters (sampling temperature, pH, and type of SPME fibers) were optimized to improve sampling efficiency in two aspects ; maximum adsorption and selective adsorption of volatile organic acids onto SPME fibers.

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