Comparison of Liquid-Liquid Extraction, Simultaneous Distillation Extraction, Ultrasound-Assisted Solvent Extraction, and Headspace Solid-Phase Microextraction for the Determination of Volatile Compounds in Jujube Extract by Gas Chromatography/Mass Spectrometry was written by Wang, Hui;Li, Peng;Sun, Shi-Hao;Zhang, Qi-Dong;Su, Yue;Zong, Yong-Li;Xie, Jian-Ping. And the article was included in Analytical Letters in 2014.Related Products of 763-69-9 The following contents are mentioned in the article:
Jujube extract has a unique flavor that has been used as a common fragrance due to the volatile compounds In this study, the volatiles of jujube extract were isolated by liquid-liquid extraction, simultaneous distillation extraction, ultrasound-assisted solvent extraction, and headspace solid-phase microextraction, and analyzed by gas chromatog.-mass spectrometry. Altogether 92 compounds were identified by the four methods, of which 53 components were identified for the first time; however, only 21 compounds were identified by all these methods. The performance characteristics of the four pretreatment techniques were compared by principal component anal. which showed that the volatile compounds obtained by liquid-liquid extraction and ultrasound-assisted solvent extraction were similar both in categories and in content; whereas, the volatiles extracted by simultaneous distillation extraction, ultrasound-assisted solvent extraction, and headspace solid-phase microextraction greatly varied. The results indicated that a multi-pretreatment technique should be adopted in order to obtain the most complete information about the volatile compounds in jujube extract The ultrasound-assisted solvent extraction method exhibited excellent repeatability and recoveries, and was very suitable for quant. anal. Although the recoveries and reproducibility of headspace solid-phase microextraction were inferior to the other methods, it was more sensitive than other methods. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Related Products of 763-69-9).
Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Related Products of 763-69-9
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics