Test of Isotopic Fractionation during Liquid-Liquid Extraction of Volatile Components from Fruits

1995 ◽  
Vol 43 (4) ◽  
pp. 981-983 ◽  
Author(s):  
Sophie Dautraix ◽  
Karin Gerola ◽  
Roger Guilluy ◽  
Jean-Louis Brazier ◽  
Anne Chateau ◽  
...  
Keyword(s):  
Isotopic Fractionation ◽  
Liquid Extraction ◽  
Volatile Components ◽  
Liquid Liquid Extraction

scholarly journals Simultaneous Distillation Extraction of Some Volatile Flavor Components from Pu-erh Tea Samples—Comparison with Steam Distillation-Liquid/Liquid Extraction and Soxhlet Extraction

2009 ◽  
Vol 2009 ◽  
pp. 1-6 ◽  
Author(s):  
Xungang Gu ◽  
Zhengzhu Zhang ◽  
Xiaochun Wan ◽  
Jingming Ning ◽  
Chengcheng Yao ◽  
...  
Keyword(s):  
Steam Distillation ◽  
Internal Standard ◽  
Soxhlet Extraction ◽  
Liquid Extraction ◽  
Volatile Components ◽  
Liquid Liquid Extraction ◽  
Flavor Components ◽  
Volatile Flavor ◽  
Linalool Oxide ◽  
Simultaneous Distillation Extraction

A simutaneous distillation extraction (SDE) combined GC method was constructed for determination of volatile flavor components in Pu-erh tea samples. Dichloromethane and ethyl decylate was employed as organic phase in SDE and internal standard in determination, respectively. Weakly polar DB-5 column was used to separate the volatile flavor components in GC, 10 of the components were quantitatively analyzed, and further confirmed by GC-MS. The recovery covered from 66.4%–109%, and repeatability expressed as RSD was in range of 1.44%–12.6%. SDE was most suitable for the extraction of the anlytes by comparing with steam distillation-liquid/liquid extraction and Soxhlet extraction. Commercially available Pu-erh tea samples, including Pu-erh raw tea and ripe tea, were analyzed by the constructed method. the high-volatile components, such as benzyl alcohol, linalool oxide, and linalool, were greatly rich in Pu-erh raw teas, while the contents of 1,2,3-Trimethoxylbenzene and 1,2,4-Trimethoxylbenzene were much high in Pu-erh ripe teas.

scholarly journals Influence of Skin-Contact Treatment on Aroma Profile of Malvasia Aromatica Wines in D.O. “Vinos de Madrid”

2021 ◽  
Author(s):  
Julia Crespo ◽  
Valeria Romero ◽  
Margarita García ◽  
Teresa Arroyo ◽  
Juan M. Cabellos
Keyword(s):  
Volatile Compounds ◽  
Contact Time ◽  
Liquid Extraction ◽  
Volatile Components ◽  
Floral Character ◽  
White Wines ◽  
Aroma Profile ◽  
Skin Contact ◽  
Liquid Liquid Extraction ◽  
Organoleptic Characteristics

The effects of prefermentative cold skin-contact technique using Malvasia aromatica were studied as a first step to adapt to the climate change related effects in order to intensify the aroma potential of white wines of the D.O. “Vinos de Madrid” keeping the organoleptic characteristics of the region. Major volatile compounds were extracted by liquid–liquid extraction and quantified by GC-FID. Minor volatile compounds were determined by HS-SPME/GC–MS. Sensory analysis were also carried out to describe and quantify attributes of the wines. A total of 37 components were identified and quantified. Volatile components showed mixed behavior depending on the skin-contact time. Skin-contact for longer helps to enhance the floral character provided by some compounds contained in the skin, especially linalool and 2-phenyl etanol and were impact odorants of Malvasia aromatica wine based on odor activity values (OAVs).

Determination of levamisole residue in animal livers by two liquid-liquid extraction steps-gas chromatography-mass spectrometry

2013 ◽  
Vol 30 (9) ◽  
pp. 922-925 ◽  
Author(s):  
Jing XU ◽  
Shanshan XIAO ◽  
Weifeng DONG ◽  
Kai SUI ◽  
Jijuan CAO ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Liquid Extraction ◽  
Gas Chromatography Mass Spectrometry ◽  
Liquid Liquid Extraction ◽  
Chromatography Mass Spectrometry

Comparison of Sorption and Extraction Methods for Recovery of Trace Organics from Water

1983 ◽  
Vol 15 (6-7) ◽  
pp. 149-159 ◽  
Author(s):  
V C Blok ◽  
G P Slater ◽  
E M Giblin
Keyword(s):  
Solvent Extraction ◽  
Methylene Chloride ◽  
Extraction Methods ◽  
Liquid Extraction ◽  
Standard Mixture ◽  
Liquid Liquid Extraction ◽  
Trace Organics ◽  
Tenax Gc

Several commercially available adsorbents were compared with solvent extraction methods for their utility in recovering trace organics from water. The adsorbents examined included Amberlite XAD-2, XAD-4 and XAD-8, Ambersorb XE340 and XE348 and Tenax-GC. All were found to produce high artifact levels, even after extensive clean-up, making them unsuitable for the analysis of trace organics in water. Quantitatively, Likens-Nickerson or continuous liquid-liquid extraction with méthylene chloride gave better recoveries than the adsorbents. Qualitatively, extractive methods were preferred as they yielded much lower levels of impurities than the adsorbents. These methods of recovering trace organics were evaluated using a standard mixture of compounds added to the water at a level of 55 µg/l. Likens-Nickerson extraction gave comparable recoveries of this mixture at 55 µg/l and 11 µg/l.

A Liquid–Liquid Extraction–Assisted HPLC Procedure for Assaying of Citalopram in Depressed Women Saliva

2017 ◽  
Vol 13 (4) ◽  
Author(s):  
Ewelina Dziurkowska ◽  
Marek Wesolowski
Keyword(s):  
Liquid Extraction ◽  
Liquid Liquid Extraction
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