Pressurized liquid extraction as a green approach in food and herbal plants extraction: A review

Mustafa, Arwa; Turner, Charlotta

doi:10.1016/j.aca.2011.07.018

Cited by 860 publications

(506 citation statements)

References 153 publications

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“…21 It is therefore expected that a longer extraction should provide higher efficiency. However, it is also possible that prolonged heating could lead to degradation of the compounds of interest.…”

Section: Resultsmentioning

confidence: 99%

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Conyza canadensis: Green Extraction Method of Bioactive Compounds and Evaluation of Their Antifungal Activity

Porto¹,

Rath²,

Queiroz³

2016

J. Braz. Chem. Soc.

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Synthetic fungicides are a common treatment for post-harvest diseases in fruits, although demand is increasing for alternatives such as biopesticides. The aim of this work was to investigate the presence of naturally occurring antifungal compounds in Brazilian specimens of the weed Conyza canadensis. Two compounds [(4Z)-lachnophyllum lactone and (4Z,8Z)-matricaria lactone] were isolated and their antifungal activities were evaluated against eight postharvest disease fungi. Aspergillus niger, Cladosporium sp., and Penicillium digitatum proved susceptible to the treatment (minimum inhibitory concentrations varying from 32 to 64 µg mL -1 ). These fungi are common postharvest pathogens of fruits and vegetables, causing rots and secreting mycotoxins. A green and sustainable extraction method employing pressurized hot water was developed and optimized (100 °C, 4 × 1 min cycles). Yields of 1.46 and 0.24 mg g -1 were obtained for (4Z)-lachnophyllum lactone and (4Z,8Z)-matricaria lactone, respectively. The extract could be applied directly to fruits and vegetables in postharvest treatments.

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Section: Resultsmentioning

confidence: 99%

“…20,21 Temperature affects the polarity of the extraction solvent and its capacity to penetrate into the matrix, altering its surface tension and viscosity. Furthermore, selection of a suitable temperature is essential to avoid degradation of thermolabile compounds and to prevent hydrolysis and oxidation reactions.…”

Section: Resultsmentioning

confidence: 99%

Conyza canadensis: Green Extraction Method of Bioactive Compounds and Evaluation of Their Antifungal Activity

Porto¹,

Rath²,

Queiroz³

2016

J. Braz. Chem. Soc.

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“…An elementary aspect in the choice of solvent is "like dissolves like", which indicated the analyte of interest should have high solubility in the selected solvents [37]. Using a mixture of ethanol and water on the recoveries of phenols and flavonoids from different herbs has been discussed in some studies [38,39].…”

Section: Effects Of Different Ethanol Concentrationmentioning

confidence: 99%

Optimization of Ultrasonic-Assisted Extraction of Flavonoid Compounds and Antioxidants from Alfalfa Using Response Surface Method

2015

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Ultrasonic-assisted extraction (UAE) was used to extract flavonoid-enriched antioxidants from alfalfa aerial part. Response surface methodology (RSM), based on a four-factor, five-level central composite design (CCD), was employed to obtain the optimal extraction parameters, in which the flavonoid content was maximum and the antioxidant activity of the extracts was strongest. Radical scavenging capacity of the extracts, which represents the amounts of antioxidants in alfalfa, was determined by using 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulphonicacid) (ABTS) and 2,2′-diphenyl-1-picrylhydrazyl (DPPH) methods. The results showed good fit with the proposed models for the total flavonoid extraction (R 2 = 0.9849), for the antioxidant extraction assayed by ABTS method (R 2 = 0.9764), and by DPPH method (R 2 = 0.9806). Optimized extraction conditions for total flavonoids was a ratio of liquid to solid of 57.16 mL/g, 62.33 °C, 57.08 min, and 52.14% ethanol. The optimal extraction parameters of extracts for the highest antioxidant activity by DPPH method was a ratio of liquid to solid 60.3 mL/g, 54.56 °C, 45.59 min, and 46.67% ethanol, and by ABTS assay was a ratio of liquid to solid 47.29 mL/g, 63.73 °C, 51.62 min, and 60% ethanol concentration. Our work offers optimal extraction conditions for total flavonoids and antioxidants from alfalfa.

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“…Extract cleanup and concentration are frequently required prior to instrumental analysis. Despite the problems associated with liquid extraction (emulsion formation, long extraction times, difficult automation, waste disposal, potential cross-contamination), the number of published research works in which liquid extraction is employed, has continued growing during the last decade (Mustafa & Turner, 2011;Zhang & Li, 2010). Solid-phase extraction (SPE), which appeared around 40 years ago, has been implemented as a competitive alternative to liquid extraction (Fritz, 1999;Thurman & Mills, 1998).…”

Section: Extraction Proceduresmentioning

confidence: 99%

GC-MS Analysis of Volatile Plant Secondary Metabolites

Stashenko¹,

Martı́nez²

2012

Gas Chromatography in Plant Science, Wine Technology, Toxicology and Some Specific Applications

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Pressurized liquid extraction as a green approach in food and herbal plants extraction: A review

Cited by 860 publications

References 153 publications

Conyza canadensis: Green Extraction Method of Bioactive Compounds and Evaluation of Their Antifungal Activity

Conyza canadensis: Green Extraction Method of Bioactive Compounds and Evaluation of Their Antifungal Activity

Optimization of Ultrasonic-Assisted Extraction of Flavonoid Compounds and Antioxidants from Alfalfa Using Response Surface Method

GC-MS Analysis of Volatile Plant Secondary Metabolites

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