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 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.

scholarly journals Extraction of Illegal Dyes from Red Chili Peppers with Cholinium-Based Deep Eutectic Solvents

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Shuqiang Zhu ◽  
Dongling Liu ◽  
Xinyue Zhu ◽  
Along Su ◽  
Haixia Zhang
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Raw Material ◽  
Extraction Time ◽  
Solvent Ratio ◽  
Extraction Temperature ◽  
Green Solvents ◽  
Hydrogen Bond Donor ◽  
Relative Standard ◽  
Orange G

Deep eutectic solvents (DESs) as a new kind of green solvents have been used to extract bioactive compounds but there are few applications in extracting chrysoidine dyes. In this study, we developed an ultrasonic-assisted extraction method with choline chloride/hydrogen bond donor (ChCl/HBD) DES for the extraction of chrysoidine G (COG), astrazon orange G (AOG), and astrazon orange R (AOR) in food samples. Some experimental parameters, such as extraction time, raw material/solvent ratio, and temperature, were evaluated and optimized as follows: the ratio of ChCl/HBD, 1 : 2 (v/v); the ratio of sample/DES, 1 : 10 (g/mL); extraction time, 20 min; extraction temperature, 50°C. Under the optimized conditions, the limits of detection (μg/mL) were 0.10 for COG and 0.06 for AOG and AOR. The relative standard deviations were in the range of 1.2–2.1%. The recoveries of the three dyes were in the range of 80.2–105.0%. By comparing with other commonly used solvents for extracting chrysoidine dyes, the advantages of DESs proved them to be potential extraction solvents for chrysoidine G, astrazon orange G, and astrazon orange R in foods.

scholarly journals Deep eutectic solvents aqueous two-phase system based ultrasonically assisted extraction of ursolic acid (UA) from Cynomorium songaricum Rupr.

2017 ◽  
Author(s):  
Xifeng Zhang ◽  
Ji Zhang
Keyword(s):  
Ursolic Acid ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Selective Extraction ◽  
Phase System ◽  
Green Solvents ◽  
Active Components ◽  
Two Phase ◽  
Solid Ratio

Deep eutectic solvents (DESs) are new green solvents that have attracted the attention of the scientific community mainly due to their unique properties and special characteristics, which are different from those of traditional solvents.A method based on ultrasonically assisted deep eutectic solvent aqueous two-phase systems( UAE-DES-ATPS) was developed for extracting ursolic acid (UA) from Cynomorium songaricum Rupr. Four different types of choline chloride-based DESs were prepared.Choline chloride-glucose (ChCl-Glu) exhibited good selective extraction ability. An optimum DES-ATPS of 36% (w/w) ChCl-Glu and 25% (w/w) K2HPO4 was considered to be a satisfactory system for extracting UA. Response surface methodology (RSM) method was used to optimize the extraction of UA using UAE-DES-ATPS. The optimum ultrasound-assisted conditions were as follows: solvent to solid ratio of 15:1 (g/g), ultrasound power of 470 W, and extraction time of 54 min. Compared with the conventional UAE method, the yields were basically the same, but the presented method had higher purity. The structure of UA did not change between pure UA and UA in the upper phase by UV–vis and FT-IR. This approach using ChCl-based DES-ATPS as a novel extraction system and ultrasound as a source of energy provided better choice for the separation of active components from other natural products.

scholarly journals Green and Efficient Extraction of Resveratrol from Peanut Roots Using Deep Eutectic Solvents

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Jingnan Chen ◽  
Xingxing Jiang ◽  
Guolong Yang ◽  
Yanlan Bi ◽  
Wei Liu
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Extraction Yield ◽  
Box Behnken Design ◽  
Assisted Extraction ◽  
Ultrasonic Assisted ◽  
Efficient Extraction ◽  
Ultrasonic Assisted Extraction ◽  
Solid Liquid ◽  
Total Extraction

Deep eutectic solvents (DESs), a new group of ecofriendly solvent combined with the ultrasonic-assisted extraction (UAE) technique, were first successfully used for extraction of resveratrol from peanut roots. Resveratrol in the extract was analyzed and quantified using a HPLC-UV method. A series of DESs consisting of choline chloride (ChCl) and 1,4-butanediol, citric acid, and ethylene glycol were formulated, finding ChCl/1,4-butanediol was a most proper extraction system. The optimal extraction parameters were obtained using a Box–Behnken design (BBD) test combined with response surface methodology as follows: 40% of water in ChCl/1,4-butanediol (1/3, g/g) at 55°C for 40 min and solid/liquid ratio of 1:30 g/mL. The total extraction content and extraction yield of resveratrol from peanut roots could reach 38.91 mg/kg and 88.19%, respectively, under such optimal conditions. The present study will provide a typical example for using DESs to extract natural bioactive compounds from plants.

scholarly journals Structural and Transport Properties of Binary Mixtures of Deep Eutectic Solvent (Ethaline) with Primary Alcohols: A Molecular Dynamics Study

2021 ◽  
Author(s):  
kishant kumar ◽  
Anand Bharti ◽  
Aditya Sinha
Keyword(s):  
Molecular Dynamics ◽  
Transport Properties ◽  
Binary Mixtures ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Md Simulations ◽  
Molar Ratio ◽  
Green Solvents ◽  
Primary Alcohols

<table><tr><td>Deep eutectic solvents (DESs) are classified as the green solvents which are considered as an alternative to volatile organic solvents. In this work, the thermophysical, structural and transport properties of binary mixtures of DES ethaline (choline chloride (ChCl) + ethylene glycol (etgly) at a molar ratio of 1:2) with primary alcohols (methanol/ethanol) are studied using molecular dynamics (MD) simulations</td></tr></table> <br>

scholarly journals Deep eutectic solvents aqueous two-phase system based ultrasonically assisted extraction of ursolic acid (UA) from Cynomorium songaricum Rupr.

2017 ◽  
Author(s):  
Xifeng Zhang ◽  
Ji Zhang
Keyword(s):  
Ursolic Acid ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Selective Extraction ◽  
Phase System ◽  
Green Solvents ◽  
Active Components ◽  
Two Phase ◽  
Solid Ratio

Deep eutectic solvents (DESs) are new green solvents that have attracted the attention of the scientific community mainly due to their unique properties and special characteristics, which are different from those of traditional solvents.A method based on ultrasonically assisted deep eutectic solvent aqueous two-phase systems( UAE-DES-ATPS) was developed for extracting ursolic acid (UA) from Cynomorium songaricum Rupr. Four different types of choline chloride-based DESs were prepared.Choline chloride-glucose (ChCl-Glu) exhibited good selective extraction ability. An optimum DES-ATPS of 36% (w/w) ChCl-Glu and 25% (w/w) K2HPO4 was considered to be a satisfactory system for extracting UA. Response surface methodology (RSM) method was used to optimize the extraction of UA using UAE-DES-ATPS. The optimum ultrasound-assisted conditions were as follows: solvent to solid ratio of 15:1 (g/g), ultrasound power of 470 W, and extraction time of 54 min. Compared with the conventional UAE method, the yields were basically the same, but the presented method had higher purity. The structure of UA did not change between pure UA and UA in the upper phase by UV–vis and FT-IR. This approach using ChCl-based DES-ATPS as a novel extraction system and ultrasound as a source of energy provided better choice for the separation of active components from other natural products.

scholarly journals Deep Eutectic Solvent Dyeing of Cellulose Acetate Nanofibers With Disperse Dyes: Kinetics, Isotherm and Thermodynamic Studies

2021 ◽  
Author(s):  
Muhammad Tarique ◽  
Winges Fatima ◽  
Faraz Khan Mahar ◽  
Min Li ◽  
Jing Gu ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Color Index ◽  
Choline Chloride ◽  
Short Interval ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Disperse Dyes ◽  
Green Solvents ◽  
Distinctive Features ◽  
Dyeing Process

Abstract Deep Eutectic Solvents (DES) was introduced more than a decade ago and has been used in variety of applications based on their unique chemical and physical properties. Recently, they have shown a considerable attention in various sectors including nanotechnology because they have distinctive features as “New green solvents”. Within this scope of work, we introduced choline chloride (CC) as a DES which is nontoxic, inexpensive and has tendency to improve color yield properties of disperse dyes on the nanofibers membrane. Cellulose acetate nanofibers (CANF) were electrospun and dyed with Color Index Disperse Red 277, Color Index Disperse Blue 165:1, and Color Index Disperse Yellow 211 in Choline chloride:Ethylene glycol (CC:EG) media and Choline chloride:Urea (CC:Urea) media by using high-temperature exhaust method. Results revealed that dyeing of CANF by CC:EG media has good color fixation properties than CC:Urea media. The dyed samples were characterized by FTIR and SEM. Further, the thermodynamic, standard affinities, and kinetic parameters have also been analyzed. The proposed dyeing of CANF with DES showed excellent calorimetric properties within a short interval of time as compared to conventional dyeing process.

scholarly journals Impact of Deep Eutectic Solvents on Extraction of Polyphenols from Grape Seeds and Skin

2020 ◽  
Vol 10 (14) ◽  
pp. 4830
Author(s):  
Nevena Dabetić ◽  
Vanja Todorović ◽  
Manuela Panić ◽  
Ivana Radojčić Redovniković ◽  
Sladjana Šobajić
Keyword(s):  
Antioxidant Activity ◽  
Citric Acid ◽  
Choline Chloride ◽  
Composite Index ◽  
Deep Eutectic Solvents ◽  
Array Detector ◽  
Phenolic Antioxidants ◽  
Green Solvents ◽  
Grape Seeds ◽  
Grape Skin

In the past few years, research efforts have focused on plant exploitation for deriving some valuable compounds. Extraction has been usually performed using petrochemical and volatile organic solvents, but nowadays, increased recognition of environmental pollution has prompted the utilization of green solvents as alternatives. Therefore, the aim of the present study was to exploit deep eutectic solvents (DES) (choline chloride: citric acid and choline chloride: glucose) as solvents for extracting valuable phenolic antioxidants from grapes. Investigation was conducted on ten grape varieties, observing seeds and skin as different matrix. Total polyphenol content (TPC) was determined by Folin-Ciocalteu spectrophotometric microassay. Antioxidant activity was investigated using four different tests and results were combined in a unique Antioxidant Composite Index (ACI) to reveal comprehensive information about this biological activity. Polyphenol compounds were identified and quantified with the aim of HPLC-diode array detector (DAD). Overall results support that DES (particularly choline chloride: citric acid) were comparable to conventional solvent, and in most cases even outperformed acidified aqueous ethanol (concerning extraction efficiency and antioxidant activity). Regardless of varietal distinctions, grape seeds have higher antioxidant capacity compared to grape skin, and such findings are according to their phenol compound concentrations.

Sign in / Sign up

Export Citation Format

Share Document