Eco-friendly and high-efficient extraction of natural antioxidants from Polygonum aviculare leaves using tailor-made deep eutectic solvents as extractants

2021 ◽  
Vol 262 ◽  
pp. 118339
Author(s):  
Lingfeng Wu ◽  
Zhaonan Chen ◽  
Songjie Li ◽  
Lu Wang ◽  
Jiachao Zhang
Keyword(s):  
Natural Antioxidants ◽  
Deep Eutectic Solvents ◽  
Polygonum Aviculare ◽  
High Efficient ◽  
Efficient Extraction

scholarly journals Environmentally Friendly Techniques and Their Comparison in the Extraction of Natural Antioxidants from Green Tea, Rosemary, Clove, and Oregano

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1869
Author(s):  
Mariel Calderón-Oliver ◽  
Edith Ponce-Alquicira
Keyword(s):  
Green Tea ◽  
Electric Fields ◽  
Antioxidant Activities ◽  
Environmentally Friendly ◽  
Natural Antioxidants ◽  
Deep Eutectic Solvents ◽  
Extraction Methods ◽  
Extraction Techniques ◽  
Health Trends ◽  
Food Applications

Many current food and health trends demand the use of more ecological, sustainable, and environmentally friendly techniques for the extraction of bioactive compounds, including antioxidants. However, extraction yields and final antioxidant activities vary between sources and are highly influenced by the given extraction method and nature and ratio of the employed solvent, especially for total polyphenols, flavonoids, and anthocyanins, which are well recognized as natural antioxidants with food applications. This review focused on the most common extraction techniques and potential antioxidant activity in the food industry for various natural antioxidant sources, such as green tea, rosemary, clove, and oregano. Green extraction techniques have been proven to be far more efficient, environmentally friendly, and economical. In general, these techniques include the use of microwaves, ultrasound, high hydrostatic pressure, pulsed electric fields, enzymes, and deep eutectic solvents, among others. These extraction methods are described here, including their advantages, disadvantages, and applications.

Green and efficient extraction of different types of bioactive alkaloids using deep eutectic solvents

2019 ◽  
Vol 145 ◽  
pp. 345-353 ◽  
Author(s):  
Zheng-Meng Jiang ◽  
Lan-Jin Wang ◽  
Zhao Gao ◽  
Bo Zhuang ◽  
Qiang Yin ◽  
...  
Keyword(s):  
Deep Eutectic Solvents ◽  
Different Types ◽  
Efficient Extraction

scholarly journals Highly Efficient Extraction Procedures Based on Natural Deep Eutectic Solvents or Ionic Liquids for Determination of 20-Hydroxyecdysone in Spinach

Molecules ◽  
2020 ◽  
Vol 25 (20) ◽  
pp. 4736
Author(s):  
Sylwia Bajkacz ◽  
Kornelia Rusin ◽  
Anna Wolny ◽  
Jakub Adamek ◽  
Karol Erfurt ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Extraction Procedure ◽  
Deep Eutectic Solvents ◽  
Molar Ratio ◽  
Green Extraction ◽  
Natural Deep Eutectic Solvents ◽  
Efficient Extraction ◽  
Solid Liquid ◽  
Extraction Agent

A novel, efficient extraction procedure based on natural deep eutectic solvents (NADES) and ionic liquids (ILs) for determination of 20-hydroxyecdysone (20-E) in spinach has been developed. NADES, the first green extraction agent, with different hydrogen bond donors and acceptors are screened in order to determine extraction efficiencies. NADES consisting of lactic acid and levulinic acid at a molar ratio of 1:1 exhibits the highest yields. ILs, the second green extraction agent, with various cations and anions are also investigated, where [TEA] [OAc]·AcOH, χAcOH = 0.75 displays the highest recovery. Moreover, NADES-SLE and IL-SLE (SLE, solid-liquid extraction) parameters are investigated. Using the obtained optimized method, the recoveries of the target compound in spinach are above 93% and 88% for NADES-SLE and IL-SLE procedure, respectively. The methods display good linearity within the range of 0.5–30 μg/g and LODs of 0.17 µg/g. The proposed NADES-SLE-UHPLC-UV and IL-SLE-UHPLC-UV procedures can be applied to the analysis of 20-E in real spinach samples, making it a potentially promising technique for food matrix. The main advantage of this study is the superior efficiency of the new, green extraction solvents, which results in a significant reduction of extraction time and solvents as compared to those in the literature.

scholarly journals Green and Efficient Extraction of Polysaccharides From Poria cocos F.A. Wolf by Deep Eutectic Solvent

2020 ◽  
Vol 15 (2) ◽  
pp. 1934578X1990070 ◽  
Author(s):  
Weida Zhang ◽  
Shaobo Cheng ◽  
Xiaona Zhai ◽  
Junshe Sun ◽  
Xuefang Hu ◽  
...  
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Extraction Yield ◽  
Hot Water ◽  
Poria Cocos ◽  
Extraction Solvent ◽  
Molecular Weight Distributions ◽  
Efficient Extraction ◽  
Run Test

Deep eutectic solvents (DESs) were proposed for the extraction of polysaccharides from Poria cocos (PCPs). Six types of DESs were prepared, and the DES composed of choline chloride and oxalic acid was proved to be suitable. Based on the results of single-factor test, the Box-Behnken experimental design with response surface methodology was carried out, giving the optimal extraction conditions including mole ratio of 1:2 (choline chloride:oxalic acid) and extraction 15 minutes at 100°C. Under the optimal extraction conditions, the extraction yield (46.24% ± 0.13%) was 8.6 times higher than that of hot water. The reusability of DES was demonstrated by a 6-run test, and an extraction yield of PCP was 38.40% ± 0.23% after reusing for 6 times without adding any additional chemicals. Moreover, molecular weight distributions of the resulting PCP were analyzed, and then mainly distributed in the range of 753 to 3578 g/mol. Therefore, DESs were proved to be an excellent extraction solvent alternative to the extraction of PCP.

Efficient extraction of major catechins in Camellia sinensis leaves using green choline chloride-based deep eutectic solvents

RSC Advances ◽  
2015 ◽  
Vol 5 (114) ◽  
pp. 93937-93944 ◽  
Author(s):  
Ji Li ◽  
Zhigang Han ◽  
Yongpeng Zou ◽  
Bo Yu
Keyword(s):  
Organic Acids ◽  
Camellia Sinensis ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Green Solvents ◽  
Efficient Extraction

Choline chloride-based deep eutectic solvents (DESs), composed of alcohols, organic acids and saccharides, were used as green solvents for extraction of major catechins inCamellia sinensisleaves.

scholarly journals Customized Deep Eutectic Solvents as Green Extractants for Ultrasonic-Assisted Enhanced Extraction of Phenolic Antioxidants from Dogbane Leaf-Tea

Foods ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2527
Author(s):  
Ruimin Wang ◽  
Weimin Zhang ◽  
Ruiping He ◽  
Wu Li ◽  
Lu Wang
Keyword(s):  
Antioxidant Activity ◽  
Water Content ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Extraction Methods ◽  
Wall Structure ◽  
Total Phenolic ◽  
Phenolic Antioxidants ◽  
High Efficient ◽  
Ultrasonic Assisted

This study evaluates the application of eco-friendly deep eutectic solvents (DESs) in the extraction of phenolic antioxidants from dogbane leaf-tea (DLT). The results showed DESs with lower viscosity allowed an efficient extraction of significantly higher contents of total phenolics or flavonoids. An innovative and high-efficient solvent, choline chloride-levulinic acid (ChCl-LevA), was screened and used in ultrasonic-assisted extraction (UAE) of phenolic compounds from DLT. According to full factorial design experimental results, total phenolic content (TPC), total flavonoid content (TFC), antioxidant activity, and anti-α-glucosidase activity (α-GIA) of the DLT extracts were simultaneously optimized by response surface methodology. Sonication temperature and water content in ChCl-LevA were found to be the major factors affecting the TPC, TFC, antioxidant activity, and α-GIA of DLT extracts. Under the optimum parameters (water content in ChCl-LevA was 45%, sonication temperature was 50 °C, and extraction time was 30 min), the measured results for all the responses were obtained as follows: TPC-91.38 ± 7.20 mg GAE/g DW, TFC-84.12 ± 3.47 mg RE/g DW, ABTS+-492 ± 7.33 mmol TE/g DW, FRAP-6235 ± 121 μmol Fe(II)/g DW and α-GIA-230 ± 7.59 mmol AE/g DW, which were consistent with the predicted values. In addition, strongly significant positive correlations were observed between TPC/TFC and bio-activities of the DLT extracts. HPLC results indicated high contents of (-)-epigallocatechin (4272 ± 84.86 μg/g DW), catechin (5268 ± 24.53 μg/g DW), isoquercitrin (3500 ± 86.07 μg/g DW), kaempferol 3-O-rutinoside (3717 ± 97.71 μg/g DW), and protocatechuic acid (644 ± 1.65 μg/g DW) were observed in the DLT extracts. In contrast to other extraction methods, ChCl-LevA-based UAE yielded higher TPC, TFC, individual phenolic contents, stronger antioxidant activity, and α-GIA. Scanning electron microscope (SEM) analysis further confirmed that ChCl-LevA-based UAE enhanced the disruption of cell wall structure, thereby making more phenolic antioxidants released from DLT. In short, ChCl-LevA-based UAE was confirmed to be an innovative and high-efficient method for extraction of phenolic antioxidants from DLT. Dogbane leaves can be considered as a good tea source rich in natural antioxidants.

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