scholarly journals Protic Ionic Liquids as Efficient Solvents in Microwave-Assisted Extraction of Rhein and Emodin from Rheum palmatum L.

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2770 ◽  
Author(s):  
Yunchang Fan ◽  
Zeyu Niu ◽  
Chen Xu ◽  
Lei Yang ◽  
Tuojie Yang
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Irradiation Time ◽  
Chinese Herb ◽  
Microwave Assisted Extraction ◽  
Active Components ◽  
Protic Ionic Liquids ◽  
Microwave Assisted ◽  
Rheum Palmatum ◽  
Assisted Extraction

Rheum palmatum L. (R. palmatum L.) is a traditional Chinese herb and food, in which rhein and emodin are the main bioactive components. The extraction of the two compounds from R. palmatum L. is, thus, of great importance. In this work, protic ionic liquids (PILs) were applied in the microwave-assisted extraction (MAE) of rhein and emodin from R. palmatum L., which avoids the toxicity of organic solvents. The results of the present study indicate that PILs possessing higher polarity exhibit higher extraction ability due to their stronger absorption ability for microwave irradiation. Compared with conventional solvents, such as methanol, trichloromethane, and deep eutectic solvents (DESs), the PIL, 1-butyl-3-himidazolium methanesulfonate ([BHim]MeSO3) reported herein is more efficient. The selected extraction conditions of liquid–solid ratio, microwave irradiation time, microwave irradiation power, and PIL concentration were 40 g·g−1, 50 s, 280 W, and 80%, respectively. Under the selected conditions, the extraction yields of rhein and emodin were 7.8 and 4.0 mg·g−1, respectively. These results suggest that PILs are efficient extraction solvents for the separation of active components from natural products.

Application of protic ionic liquids in the microwave-assisted extraction of phycobiliproteins from Arthrospira platensis with antioxidant activity

2020 ◽  
Vol 252 ◽  
pp. 117448 ◽  
Author(s):  
Renata Débora Pinto Rodrigues ◽  
Amanda Sousa e Silva ◽  
Thalita Adrielly Viana Carlos ◽  
Ana Karine Pessoa Bastos ◽  
Rílvia Saraiva de Santiago-Aguiar ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ionic Liquids ◽  
Arthrospira Platensis ◽  
Microwave Assisted Extraction ◽  
Protic Ionic Liquids ◽  
Microwave Assisted ◽  
Assisted Extraction

Microwave-assisted extraction of lactones from Ligusticum chuanxiong Hort. using protic ionic liquids

2011 ◽  
Vol 13 (3) ◽  
pp. 666 ◽  
Author(s):  
Chi Yansheng ◽  
Zhang Zhida ◽  
Li Changping ◽  
Liu Qingshan ◽  
Yan Peifang ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Microwave Assisted Extraction ◽  
Protic Ionic Liquids ◽  
Ligusticum Chuanxiong ◽  
Microwave Assisted ◽  
Assisted Extraction

Microwave-Assisted Extraction of Chlorophyll from Filter Mud of Sugercane Mill and Component Analysis

2012 ◽  
Vol 518-523 ◽  
pp. 430-435 ◽  
Author(s):  
Hai Rong Guo ◽  
Shao Ying Ma ◽  
Xiao Fei Wang ◽  
Er Fang Ren ◽  
Yuan Yuan Li
Keyword(s):  
Irradiation Time ◽  
Extraction Time ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Optimal Conditions ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Conventional Extraction ◽  
Filter Mud ◽  
Strong Absorption Peak

Microwave-assisted extraction (MAE) was used to extract chlorophylls from filter mud. Ethanol was used as the solvent. The optimal conditions for the MAE of chlorophylls were concluded from the study as the irradiation time, 50 s, the ratio of liquid to solid, 8:1 (mL/g), the extraction temperature, 40 °C, and the extraction time, 60 min. Compared with conventional extraction, the MAE of chlorophylls from the filter mud was more effective. The extraction time for MAE was 60 min with 0.277 mg/g chlorophyll yield, while conventional extraction needed 240 min with only about 0.259 mg/g chlorophyll yield. The Ultraviolet Absorption Spectra of the extracted chlorophylls showed that there was a strong absorption peak at about 663 nm. C=N, Mg-N and C-N was not seen existed from the infrared spectroscopy probably because that the mixed extracts were not purified and the chlorophyll content was less.

Application of ionic liquids based microwave-assisted extraction of three alkaloids N-nornuciferine, O-nornuciferine, and nuciferine from lotus leaf

Talanta ◽  
2010 ◽  
Vol 80 (3) ◽  
pp. 1292-1297 ◽  
Author(s):  
Wenyan Ma ◽  
Yanbin Lu ◽  
Ruilin Hu ◽  
Jihang Chen ◽  
Zizhang Zhang ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Microwave Assisted Extraction ◽  
Lotus Leaf ◽  
Microwave Assisted ◽  
Assisted Extraction

Study on Microwave-Assisted Extraction of Polysaccharides from Radix astragali

2014 ◽  
Vol 675-677 ◽  
pp. 1634-1637 ◽  
Author(s):  
Cong Liang Huang
Keyword(s):  
Irradiation Time ◽  
Good Alternative ◽  
Extraction Yield ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Radix Astragali ◽  
Solid Ratio ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Orthogonal Test Design

In this study, microwave-assisted extraction (MAE) was employed for the extraction of polysaccharides from Radix Astragali (PRA). The extraction parameters that influenced the extraction yield of PRA were optimized by orthogonal test design. The results showed that the optimal MAE conditions were as followings: liquid-solid ratio of 18 ml/g, irradiation time of 8 min, irradiation power of 300 W and extraction temperature of 65°C, while extraction yield of PRA was 8.39 %. The developed MAE method provided a good alternative for the extraction of PRA.

Ionic liquids based simultaneous ultrasonic and microwave assisted extraction of phenolic compounds from burdock leaves

2012 ◽  
Vol 716 ◽  
pp. 28-33 ◽  
Author(s):  
Zaixiang Lou ◽  
Hongxin Wang ◽  
Song Zhu ◽  
Shangwei Chen ◽  
Ming Zhang ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Phenolic Compounds ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

scholarly journals Application of Ionic Liquids in the Microwave-Assisted Extraction of Proanthocyanidins from Larix gmelini Bark

2012 ◽  
Vol 13 (4) ◽  
pp. 5163-5178 ◽  
Author(s):  
Lei Yang ◽  
Xiaowei Sun ◽  
Fengjian Yang ◽  
Chunjian Zhao ◽  
Lin Zhang ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Larix Gmelini

scholarly journals Optimization of the microwave assisted extraction and biological activities of polyphenols from lemon verbena leaves

2021 ◽  
Vol 45 (1) ◽  
pp. 157-177
Author(s):  
Zohra Touati ◽  
Menana Guemghar ◽  
Kenza Bedjaoui ◽  
Nabila Emilia Djerrada ◽  
Kahina Djaoud ◽  
...  
Keyword(s):  
Irradiation Time ◽  
Biological Activities ◽  
Reducing Power ◽  
Biological Properties ◽  
Total Phenolic ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Disk Diffusion Assay ◽  
Lemon Verbena

The present study aims to optimize the extraction of phenolics by microwave-assisted extraction (MAE) using the response surface methodology (RSM), from Lemon verbena leaves. The optimized extract was tested for its antioxidant activity using two methods (DPPH and reducing power) and its antibacterial efficiency by using disk diffusion assay and broth microdilution, against two Gram-negative (Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853) and two Gram-positive (Staphylococcus aureus ATCC 25923, Bacillus subtilis ATCC 6633) strains. Under the optimized conditions (40% (v/v): of ethanol concentration, 188 s of irradiation time, 600 W of microwave power and 1:40 g/mL of solid-to-liquid ratio) the total phenolic content (TPC) was 67.87±1.61 mg GAE/g DW. The IC50 of the extract was 139.65±1.44 µg/mL and 56.60±2.79 µg/mL for DPPH inhibition and reducing power, respectively. The best antibacterial activity was shown by the extract obtained by MAE with lower MBC (1.56 to 18.75 mg/mL) and MBC/MIC ratio. Lemon verbena extract can be used as an ingredient in cosmetics, food supplements and herbal medicinal products due to its interesting biological properties.

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