Selective extraction of hydrocarbons, phosphonates and phosphonic acids from soils by successive supercritical fluid and pressurized liquid extractions

Chaudot, Xavier; Tambute, A.; Caude, M.

doi:10.1016/s0021-9673(99)01051-1

Cited by 20 publications

(10 citation statements)

References 7 publications

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“…In addition, SFE technique is scalable up to industrial scale. Moreover, in spite of the fact that supercritical CO 2 is not a polar solvent, the addition of a cosolvent such as ethanol or methanol improves the extraction of polar compounds and may allow the fractionation of the extracts that contain compounds of different polarities (Chaudot and others ; Ashraf‐Khorassani and Taylor ; Omar and others ).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Supercritical Fluid Consecutive Extractions of Fatty Acids and Polyphenols from Vitis Vinifera Grape Wastes

Aizpurua‐Olaizola

Ormazabal

Vallejo

et al. 2014

Journal of Food Science

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In this study, supercritical fluid extraction has been successfully applied to a sequential fractionation of fatty acids and polyphenols from wine wastes (2 different vitis vinifera grapes). To this aim, in a 1st step just fatty acids were extracted and in a 2nd one the polyphenols. The variables that affected to the extraction efficiency were separately optimized in both steps following an experimental design approach. The effect of extraction temperature flow, pressure, and time were thoroughly evaluated for the extraction of fatty acids, whereas the addition of methanol was also considered in the case of the polyphenols extraction. A quantitative extraction with high efficiency was achieved at a very short time and low temperatures. Concerning quantification, fatty acids were determined by means of gas chromatography coupled to mass spectrometry after a derivatization step, whereas the polyphenols were analyzed by means of high performance liquid chromatography coupled to tandem mass spectrometry and the Folin–Ciocalteu method.

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Section: Introductionmentioning

confidence: 99%

Optimization of Supercritical Fluid Consecutive Extractions of Fatty Acids and Polyphenols from Vitis Vinifera Grape Wastes

Aizpurua‐Olaizola

Ormazabal

Vallejo

et al. 2014

Journal of Food Science

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“…Erauzketa eskala industrialean egiteko eragozpenik ez dago gainera. Hortaz gain, nahiz eta CO 2 disolbatzaile apolarra izan, etanola edo metanolaren gisako albo disolbatzaile polar bat gehitu dakioke, eta horrela, modu horretan lortzen da polartasun ezberdineko konposatuak elkarrengandik bereizita erauztea, lehenik apolarrak CO 2 soilik erabiliz eta ostean polarrak albo-disolbatzailea gehituz [20][21].…”

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Mahatsak txerritzen

Aizpurua‐Olaizola

Vallejo²,

Olivares³

et al. 2016

EKAIA

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Laburpena: Lan honetan, optimizatu egin da bi urratseko jariakin gainkritikoaren bidezko erauzketa (SFE Supercritical Fluid Extraction), ardo hondakinetatik konposatu bioaktiboak lortzeko. Ondorioz, lortu da lehen urratsean gantz azidoak soilik eta bigarren urratsean polifenolak soilik erauztea. Polifenolek egonkortasun eskasa dute ordea. Hori dela eta, zurrusta-bibrazio bidezko mikrokapsularatzea (VNM Vibration Nozzle Microencapsulation) erabili da 150 eta 300 µm-ko zurrustekin kaltzio-alginatozko eta kaltzio-alginato-kitosanezko tamaina ezberdinetako polifenolen mikrokapsulak eratzeko. Prozesu horretan eragina duten aldagaiak optimizatu, kapsulak sortu eta haien egonkortasuna aztertu da 6 hilabetetan zehar hainbat kontserbazio-baldintzatan (4°C-ra ilunpean eta giro-tenperaturan ilunpean eta argipean). Ondorioz, ikusi da kapsulatutako polifenolen egonkortasuna baldintza guztietan kapsulatu gabeena baino askoz ere handiagoa dela.Hitz-gakoak: Ardo-hondakinak, Jariakin gainkritikoaren bidezko erauzketa, mikrokapsularatzea, gantz azidoak, polifenolak.Abstract: In this study supercritical fluid extraction (SFE) has been successfully applied to a sequential fractionation of fatty acids and polyphenols from wine wastes. Unfortunately, polyphenols have a poor long-term stability, so they were encapsulated through vibration nozzle microencapsulation using two nozzles of 150 and 300 µm and sodium alginate and sodium-alginate-chitosan as polymer. Long-term stability of the created microcapsules was studied for 6 months taking into account different storage conditions: at 4 °C in darkness, and at room temperature in darkness and in presence of light. Encapsulated polyphenols were found to be much more stable compared to free polyphenols regardless the encapsulation procedure and storage conditions.

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“…The supernatant was then mixed with 300 L concentrated hydrochloric acid and a 40 L aliquot of the internal standard solution (10 g/mL EHMPA [36] in methanol). After mixing rigidly, 12 mL purified water were added for dilution before the sample was transferred to a preconditioned (1 mL methanol, 1 mL purified water) ENV+ cartridge (25 mg, 10 mL).…”

Section: Sample Preparation For the Analysis Of O-alkyl Methylphosphomentioning

confidence: 99%

GC–MS and LC–MS analysis of nerve agents in body fluids: Intra-laboratory verification test using spiked plasma and urine samples

Koller

Becker

Thiermann

et al. 2010

Journal of Chromatography B

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Selective extraction of hydrocarbons, phosphonates and phosphonic acids from soils by successive supercritical fluid and pressurized liquid extractions

Cited by 20 publications

References 7 publications

Optimization of Supercritical Fluid Consecutive Extractions of Fatty Acids and Polyphenols from Vitis Vinifera Grape Wastes

Optimization of Supercritical Fluid Consecutive Extractions of Fatty Acids and Polyphenols from Vitis Vinifera Grape Wastes

Mahatsak txerritzen

GC–MS and LC–MS analysis of nerve agents in body fluids: Intra-laboratory verification test using spiked plasma and urine samples

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