Directly Suspended Droplet Microextraction in Combination with Gas Chromatography–Mass Spectrometry for the Determination of Aroma Components in Orange Juice
摘要
A rapid, sensitive, inexpensive, and reliable analytical approach, directly suspended droplet microextraction (DSDME), was developed for the determination of aroma components in orange juice, coupled with gas chromatography-mass spectrometry. Hexane was used as the extraction solvent and placed on the top of the aqueous sample; several factors influencing the extraction and collection efficiency were optimized. The approach was used to determine some important aromas in orange juice, yielding relative recoveries of 91.66 to 109.94%, relative standard deviations of 2.04–6.91% (n = 5), and limits of detection of 0.2–1.9 μg/L. Satisfactory recoveries were obtained for all spiked compounds. The DSDME method requires minimal solvent, achieving high sensitivity with low detection limits for aroma compounds. The coupled miniaturized method was applied to the sensitive determination of aroma components in orange juice.