Pulsed Electric Field and Salvia officinalis L. Leaves: A Successful Combination for the Extraction of High Value Added Compounds

The present study aimed to evaluate the pulsed electric field (PEF)-assisted extraction of phytochemicals from Salvia officinalis L. leaves. The study parameters included a PEF pulse duration of 10 or 100 μs for 30 min, using different “green” extraction solvents: pure ethanol, pure water, and their mixtures at 25, 50, and 75% v/v concentrations. The resulting extracts were evaluated against reference extracts obtained without PEF. For estimation of the extraction efficiency, the content in total polyphenols, individual polyphenols, and volatile compounds, as well as the resistance to oxidation, were determined. The optimal PEF contribution on the total and individual polyphenols, rosmarinic acid, extractability (up to 73.2% and 403.1% increase, respectively) was obtained by 25% v/v aqueous ethanol solvent using a pulse duration of 100 μs. PEF was proven to also affect the final concentration and composition of volatile compounds of the extracts obtained.

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Optimization of Pulsed Electric Field as Standalone “Green” Extraction Procedure for the Recovery of High Value-Added Compounds from Fresh Olive Leaves

Antioxidants ◽

10.3390/antiox10101554 ◽

2021 ◽

Vol 10 (10) ◽

pp. 1554

Author(s):

Vasileios M. Pappas ◽

Achillia Lakka ◽

Dimitrios Palaiogiannis ◽

Vassilis Athanasiadis ◽

Eleni Bozinou ◽

...

Keyword(s):

Field Strength ◽

Electric Field ◽

Electric Field Strength ◽

Pulse Duration ◽

Value Added ◽

Pulsed Electric Field ◽

Fine Tuning ◽

Olive Leaves ◽

Extraction Technology ◽

Extraction Chamber

Olive leaves (OLL) are reported as a source of valuable antioxidants and as an agricultural by-product/waste. Thus, a twofold objective with multi-level cost and environmental benefits arises for a “green” standalone extraction technology. This study evaluates the OLL waste valorization through maximizing OLL extracts polyphenol concentration utilizing an emerging “green” non-thermal technology, Pulsed Electric Field (PEF). It also provides further insight into the PEF assistance span for static solid-liquid extraction of OLL by choosing and fine-tuning important PEF parameters such as the extraction chamber geometry, electric field strength, pulse duration, pulse period (and frequency), and extraction duration. The produced extracts were evaluated via comparison amongst them and against extracts obtained without the application of PEF. The Folin-Ciocalteu method, high-performance liquid chromatography, and differential scanning calorimetry were used to determine the extraction efficiency. The optimal PEF contribution on the total polyphenols extractability (38% increase with a 117% increase for specific metabolites) was presented for rectangular extraction chamber, 25% v/v ethanol:water solvent, pulse duration (tpulse) 2 μs, electric field strength (E) 0.85 kV cm−1, 100 μs period (Τ), and 15 min extraction duration (textraction), ascertaining a significant dependence of PEF assisting extraction performance to the parameters chosen.

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Pulsed electric field-assisted extraction of phenolic antioxidants from tropical almond red leaves

Chemical Papers ◽

10.1007/s11696-020-01153-x ◽

2020 ◽

Vol 74 (11) ◽

pp. 3957-3961

Author(s):

Tayebeh Nakhaei Moghaddam ◽

Amir Hossein Elhamirad ◽

Mohammad Reza Saeidi Asl ◽

Mostafa Shahidi Noghabi

Keyword(s):

Electric Field ◽

Pulsed Electric Field ◽

Phenolic Antioxidants ◽

Assisted Extraction

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Comparison of classical and ultrasound-assisted extraction of polysaccharides from Salvia officinalis L.

Ultrasonics Sonochemistry ◽

10.1016/s1350-4177(98)00046-7 ◽

1999 ◽

Vol 5 (4) ◽

pp. 163-168 ◽

Cited By ~ 101

Author(s):

Z. Hromádková ◽

A. Ebringerová ◽

P. Valachovič

Keyword(s):

Salvia Officinalis ◽

Ultrasound Assisted Extraction ◽

Assisted Extraction ◽

Ultrasound Assisted ◽

Salvia Officinalis L

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Pulsed Electric Field-Assisted Extraction of Pigments from Chlorella vulgaris

Handbook of Electroporation ◽

10.1007/978-3-319-32886-7_219 ◽

2017 ◽

pp. 2939-2954

Author(s):

Elisa Luengo ◽

Javier Raso

Keyword(s):

Electric Field ◽

Chlorella Vulgaris ◽

Pulsed Electric Field ◽

Assisted Extraction

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A Variety of Volatile Compounds as Markers in Unifloral Honey from Dalmatian Sage (Salvia officinalis L.)

Chemistry & Biodiversity ◽

10.1002/cbdv.200690134 ◽

2006 ◽

Vol 3 (12) ◽

pp. 1307-1316 ◽

Cited By ~ 34

Author(s):

Igor Jerković ◽

Josip Mastelić ◽

Zvonimir Marijanović

Keyword(s):

Volatile Compounds ◽

Salvia Officinalis ◽

Unifloral Honey ◽

Salvia Officinalis L

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IMPACT OF INSTANTANEOUS CONTROLLED PRESSURE PROP (DIC) TECHNOLOGY ON EXTRACTION OF TOTAL PHENOLS OF MOROCCAN SALVIA OFFICINALIS

JOURNAL OF ADVANCES IN CHEMISTRY ◽

10.24297/jac.v7i2.2357 ◽

2011 ◽

Vol 7 (2) ◽

pp. 1287-1295

Author(s):

Mharti Fatima-Zohra ◽

Abdellaoui Abdelfattah ◽

Kamal Ibtisam ◽

Lyoussi Badiaa ◽

Allaf Tamara ◽

...

Keyword(s):

Salvia Officinalis ◽

Raw Material ◽

Total Phenolic ◽

Total Phenols ◽

Assisted Extraction ◽

Solvent Type ◽

Pre Treatment ◽

Salvia Officinalis L ◽

Instant Controlled Pressure Drop ◽

Kinetics Of

The main objective of this study was to intensify the extraction of total phenols from Salvia officinalis L. using instant controlled pressure drop (DIC) as a texturing pre-treatment. The effect of solvent type on Total Phenolic Content (TPC) was also studied. TPC was determined using spectrophotometric Folin-Ciocalteau method and external calibration with Gallic acid. The obtained results showed that water was the most efficient solvent to extract total phenols from Salvia officinalis L. Moreover, texturing and expansion by DIC pretreatment had a great impact on polyphenol yields and revealed greater extraction kinetics. Likewise, drying kinetics of DIC-treated sage was enhanced compared to the raw material. DIC-assisted extraction can be considered as a promising technology to use in the case of the Moroccan Salvia officinalis L. as an important Mediterranean source of natural phenols.

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