scholarly journals Optimization of Rose Extraction Process by Orthogonal Design

2021 ◽  
pp. 498-515
Author(s):  
Xin Zhang, Dan Chen, Xiao Cao, Heng Li, Limin Wu
Keyword(s):  
Antioxidant Capacity ◽  
Extraction Method ◽  
Ethanol Concentration ◽  
Orthogonal Design ◽  
Water Extract ◽  
Extraction Process ◽  
Utilization Rate ◽  
Extraction Scheme ◽  
Solid Liquid ◽  
The Rose

To optimize the rose extraction process and evaluate the antioxidant properties of the extracts. The contents of gallic acid and rutin in rose extracts were used as indicators. According to the results of single-factor evaluation of the crushing degree of rose during extraction, extraction method, solid-liquid ratio of extraction and ethanol concentration. The three-factor and three-level L9 (33) orthogonal design optimized extraction scheme was established. The factor levels were as follows: solid-liquid ratio (1:8, 1:10, 1:12); Ethanol concentration of extractant (50%, 80%, 100%); Extraction method (ultrasonic treatment with ice for 30min, 3 times; Ultrasonic treatment with ice for 1h and 3 times; Reflux in water bath for 1h, 3 times); The DPPH in vitro antioxidant test was applied to compare the antioxidant capacity of the optimized extract and rose water extract. The best extraction scheme of rose was as follows: the ratio of solid to liquid was 1:10, the concentration of ethanol was 80%, and the extraction method was ultrasonic for 1 hour and repeated three times. In the antioxidant experiment, it can be found that the antioxidant capacity of the extract is significantly higher than that of the rose water extract. The optimized rose extract has a significantly higher antioxidant capacity than the rose water extract. The establishment of the extraction method significantly improves the utilization rate of antioxidant components in roses. It not only helps to improve the utilization rate of roses and avoids waste, but also helps the development and utilization of rose-related health products.

scholarly journals Impact of Extraction Conditions on the Phenolic Composition and Antioxidant Capacity of Grape Stem Extracts

Antioxidants ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 597 ◽  
Author(s):  
Nerea Jiménez-Moreno ◽  
Francesca Volpe ◽  
Jose Antonio Moler ◽  
Irene Esparza ◽  
Carmen Ancín-Azpilicueta
Keyword(s):  
Antioxidant Capacity ◽  
Gallic Acid ◽  
Bioactive Compounds ◽  
Extraction Method ◽  
Ethanol Concentration ◽  
Total Phenolic ◽  
Phenolic Composition ◽  
Total Phenolic Compounds ◽  
Extraction Solvent ◽  
Selection Of

The use of grape stems for the extraction of bioactive compounds to be used in the pharmaceutical, food, and cosmetic industries is a promising objective. The aim of this work is to determine the influence of the different extraction conditions (temperature, ethanol concentration, and ratio of sample/solvent) on phenolic composition and antioxidant capacity of Mazuelo stem extracts. In general, the ethanol concentration of the extraction solvent was the factor that had the greatest influence on the extraction of different bioactive compounds. The greatest content of total phenolic compounds and the highest antioxidant activity of the extracts were obtained with 50% ethanol and at 40 °C. The most abundant compound found in the different extracts obtained from Mazuelo grape stem was (+)-catechin, but appreciable concentrations of gallic acid, a quercetin derivative, and stilbenes (trans-resveratrol and trans-ε-viniferin) were also extracted. Quercetin and malvidin-3-glucoside showed the highest correlation with the antioxidant capacity of the extracts, while stilbenes did not present such relation. The maximum concentration of gallic acid was extracted with water but the extraction of most of the compounds was maximum on using 50% ethanol. Consequently, the selection of the extraction method to be used will depend on the particular compound to be extracted in greatest quantity.

Study on Steam Extraction Technology Assisted by Microwave of Anise Star Oil from the Fruit of Illicium verum Hook. f.

2011 ◽  
Vol 201-203 ◽  
pp. 2935-2938
Author(s):  
Guo En Yang ◽  
Gui Wu Wang ◽  
Zhi Ping Wu ◽  
Xiang Zhou Li
Keyword(s):  
Extraction Method ◽  
Steam Distillation ◽  
Influencing Factor ◽  
Extraction Process ◽  
Average Yield ◽  
Liquid Ratio ◽  
Extraction Technology ◽  
Steam Extraction ◽  
Illicium Verum ◽  
Solid Liquid

Evaluated with the yield of anise star oil, steam extraction method assisted by microwave is studied for the extraction of anise star oil from Illicium verum Hook. f. in contrast with the traditional steam distillation (SD) method in this paper. The new optimal steam extraction technology assisted by microwave of anise star oil is obtained as: extracting time 80 minutes, solid-liquid ratio(g/mL) 1:7, size of material 80~100 mesh and extracting temperature 80°C. Average yield of anise star oil is up to 11.6% (g/g) under the above technology. Size of material is the most important influencing factor in the extraction process. The optimal traditional steam distillation technology is: extracting time 120 minutes, solid-liquid ratio(g/mL) 1:6, size of material 80~100 mesh and extracting temperature 100°C , the average yield of anise star oil is only 9.81% (g/g). The steam extraction technology assisted by microwave has advantages in both the technological conditions and the yield of anise star oil than the traditional steam distillation technology.

Study on Extraction of Total Flavonoids from Licorice with Ultrasonic Assistance and Antioxidant Activity

2012 ◽  
Vol 550-553 ◽  
pp. 1629-1632 ◽  
Author(s):  
Yu Hong Zou ◽  
Qiu Xia Han ◽  
Lin Guo
Keyword(s):  
Antioxidant Activity ◽  
Ethanol Concentration ◽  
Extraction Process ◽  
Free Radical Scavenger ◽  
Extraction Rate ◽  
Radical Scavenger ◽  
Total Flavonoids ◽  
Ultrasonic Power ◽  
Liquid Ratio ◽  
Solid Liquid

To optimize the extraction process of total flavonoids from RADIX RHIZOMA GLYCYRRHIZAE and Study on the Antioxidant Activity. Total flavonoids were extracted from RADIX RHIZOMA GLYCYRRHIZAE with ethanol by ultrasonic-assisted method, whose extraction process was optimized by orthogonal test design.The scavenging effect of pumpkin polysaccharide on OH and O2-were studied by salicylic acid and pyrogallic acid method. The optimum extraction process was as follows: ethanol concentration of 75%, solid-liquid ratio of 1:25,ultrasonic power of 350 W and ultrasonic duration of 25 min.Under the above conditions, the extraction rate of total flavonoids reached as high as 1.943%. The influencing order of each factor on extraction rate of polysaccharides was determined to be: ethanol concentration＞solid-liquid ratio＞ultrasonic power＞ultrasonic duration. When the solution concentration is 1.1296mg/ml, the scavenging rate of crude flavonoids on superoxide radical is 50%.Suggesting that it would be an effctive natural free radical scavenger. The study could provide a scientific basis for the further exploitation and utilization of RADIX RHIZOMA GLYCYRRHIZAE

Kinetics of the Solid-Liquid Extraction Process of Phenolic Antioxidants and Antioxidant Capacity from Hop (Humulus lupulus L.)

2014 ◽  
Vol 50 (11) ◽  
pp. 1658-1664 ◽  
Author(s):  
Dušan Đ. Paunović ◽  
Snežana S. Mitić ◽  
Gordana S. Stojanović ◽  
Milan N. Mitić ◽  
Branka T. Stojanović ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Extraction Process ◽  
Liquid Extraction ◽  
Humulus Lupulus ◽  
Phenolic Antioxidants ◽  
Humulus Lupulus L ◽  
Solid Liquid Extraction ◽  
Solid Liquid ◽  
Kinetics Of

scholarly journals Microwave-assisted extraction in dry fruit of andean species Vaccinium meridionale: Experimental conditions on the recovery of total polyphenols

2017 ◽  
Vol 41 (6) ◽  
pp. 701-712 ◽  
Author(s):  
Wilfred Edilberto Espinosa ◽  
Luis Carlos Arturo Garzón ◽  
Oscar Julio Medina
Keyword(s):  
Ethanol Concentration ◽  
Aqueous Media ◽  
Extraction Process ◽  
Microwave Assisted Extraction ◽  
Total Polyphenols ◽  
Experimental Conditions ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Extraction Processes ◽  
Solid Liquid

ABSTRACT Due to their nutraceutical properties, the fruits of the species Vaccinium meridionale, which inhabit the Andean region, are of scientific interest. Microwave-assisted extraction has been applied to different vegetal matrices for to extract efficiently polyphenolic compounds. In this work we study in microwave assisted extraction processes, the effect on the extraction of total polyphenols in dried fruits of Vaccinium meridionale, using response surface methodology. The main objective of this research was to analyze the relationships between power, temperature, solid-liquid ratio, time and ethanol concentration in aqueous media on the effectiveness of total polyphenols recovery in dry fruits of Vaccinium meridionale. A central composite design face-centered with three levels for each variable was used: P = 300 - 900 W; T = 70 -110 °C; L:Srat. = 30:1 - 70:1 w/w; t = 5 - 15 min; [EtOH] = 0 - 80%. In this sense, the effect of the input variables on the recovery of total polyphenols, the optimization process for maximum extraction, and the comparison to other solid-liquid extractions in terms of quantity of total polyphenols, are reported. It was found that the significant variables in the extraction process were ethanol concentration, temperature and time; the best yields were obtained in the range [EtOH] = 44 - 49%, T = 110 °C, and t = 10 - 15 min. In terms of quantity, time and consumption of energy, microwave-assisted extraction technique is more efficient than other solid-liquid extraction processes for the extraction of total polyphenols.

Determination Method and Extraction Process of Total Flavonoids from Leaves of Ilex Cornuta L.

2011 ◽  
Vol 236-238 ◽  
pp. 216-219
Author(s):  
Chun Tao Kuang ◽  
Xiang Zhou Li ◽  
Yan Li Han ◽  
Yong Jun Wu
Keyword(s):  
Regression Coefficient ◽  
Orthogonal Design ◽  
Extraction Process ◽  
Total Flavonoids ◽  
Determination Method ◽  
Relative Standard ◽  
Ilex Cornuta ◽  
Total Flavonoids Content ◽  
Solid Liquid ◽  
Important Medicinal Plant

Ilex Cornuta L is an important medicinal plant. Flavonoid compounds are its main biological compontents. AlCl3 method was identified as the appropriate determination method for total flavonoids content of extract obtained from the leaves of Ilex Cornuta L.. The proposed method was validated by the linearity, reproducibility, and recovery experiments. Good linearity was observed with the regression coefficient(R2= 0.999). The recovery rate was in the range of 94.9% and 110.0%, and the relative standard deviation was 2.8%, which indicated that the proposed method was credible. In addition, the extraction parameters including Ethanol concentration, solid-liquid ratio, extraction time and extraction times were optimized by means of an orthogonal design.

scholarly journals Optimization of banana crop by-products solvent extraction for the production of bioactive compounds

2021 ◽  
Author(s):  
Sara Díaz ◽  
Antonio N. Benítez ◽  
Sara Ramírez-Bolaños ◽  
Lidia Robaina ◽  
Zaida Ortega
Keyword(s):  
Antioxidant Activity ◽  
Aqueous Ethanol ◽  
Ethanol Concentration ◽  
Extraction Process ◽  
Total Phenol Content ◽  
Optimal Conditions ◽  
Satisfactory Description ◽  
Optimized Conditions ◽  
By Products ◽  
Banana Crops

AbstractThe aim of this work is the optimization of phenolic compound extraction from three by-products of banana crops (rachis, discarded banana, and banana’s pseudostem pulp), as a way to valorize them through a green extraction process. The influence of the temperature and aqueous ethanol concentration (Et-OH) on extract properties (total phenol content (TPC) and antioxidant activity) was firstly analyzed. 78 ℃ and ethanol concentrations close to 50% yielded the best results for the three materials. The equations obtained by the response surface methodology gave a satisfactory description of the experimental data, allowing optimizing the extraction conditions. Under optimized conditions, time influence was then assessed, although this parameter seemed not influence results. Among the three by-products, rachis extract (60% Et-OH, 78 ℃, and 30 min) presented the highest TPC (796 mg gallic acid/100 g of dried material) and antioxidant activity (6.51 mg Trolox equivalents/g of dried material), followed by discarded banana, and pseudostem pulp. Under the optimal conditions, experiments were performed at a larger scale, allowing to determine the extraction yields (EY) and to characterize the extracts. The highest EY was obtained for the rachis (26%), but the extract with the highest activity was obtained for discarded banana (50% Et-OH, 78 ℃, and 60 min), which presented a TPC of 27.26 mg/g extract corresponding to 54.59 mg Trolox equivalents/g extract. This study contributes to the valorization of banana crops residues as a source of polyphenolic compounds with bioactive functions that can be extracted under economic extraction conditions. Graphical abstract

Optimization and characterization of flavonoids extracted from Cannabis sativa fibers

2021 ◽  
pp. 004051752110277
Author(s):  
Qilu Cui ◽  
Jiawei Li ◽  
Chongwen Yu
Keyword(s):  
Chemical Structure ◽  
Cannabis Sativa ◽  
Ethanol Concentration ◽  
Extraction Process ◽  
Test Results ◽  
Hemp Fiber ◽  
Hemp Fibers ◽  
Structure Surface ◽  
Degumming Process

In this paper, the extraction process of flavonoids from hemp fibers was studied. Response surface methodology (RSM) analysis of the extraction parameters indicated that optimized results would be ethanol concentration 76 vol.%, bath ratio 1:50, and reaction time 139 min; therefore, an optimal extraction rate of flavonoids of 0.2275% can be obtained. The chemical structure, surface morphology and element composition of flavonoid extracts were analyzed. The test results indicated that hemp extract contains flavonoids, which can be used to extract flavonoids from hemp fiber, so as to comprehensively develop hemp fiber and reduce the discharge of waste liquid in the traditional degumming process.

scholarly journals Optimization of Betalain Pigments Extraction Using Beetroot by-Products as a Valuable Source

Inventions ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 50
Author(s):  
Silvia Lazăr (Mistrianu) ◽  
Oana Emilia Constantin ◽  
Nicoleta Stănciuc ◽  
Iuliana Aprodu ◽  
Constantin Croitoru ◽  
...  
Keyword(s):  
Citric Acid ◽  
Acid Concentration ◽  
Ethanol Concentration ◽  
Extraction Process ◽  
Extraction Time ◽  
Quadratic Model ◽  
Citric Acid Concentration ◽  
Operating Variables ◽  
Conventional Solvent Extraction ◽  
Optimized Conditions

(1) Background: This study is designed to extract the bioactive compounds from beetroot peel for future use in the food industry. (2) Methods: Spectrophotometry techniques analyzed the effect of conventional solvent extraction on betalains and polyphenolic compounds from beetroot peels. Several treatments by varying for factors (ethanol and citric acid concentration, temperature, and time) were applied to the beetroot peel samples. A Central Composite Design (CCD) has been used to investigate the effect of the extraction parameters on the extraction steps and optimize the betalains and total polyphenols extraction from beetroot. A quadratic model was suggested for all the parameters analyzed and used. (3) Results: The maximum and minimum variables investigated in the experimental plan in the coded form are citric acid concentration (0.10–1.5%), ethanol concentration (10–50%), operating temperature (20–60 °C), and extraction time (15–50 min). The experimental design revealed variation in betalain content ranging from 0.29 to 1.44 mg/g DW, and the yield of polyphenolic varied from 1.64 to 2.74 mg/g DW. The optimized conditions for the maximum recovery of betalains and phenols were citric acid concentration 1.5%, ethanol concentration 50%, temperature 52.52 °C, and extraction time 49.9 min. (4) Conclusions: Overall, it can be noted that the extraction process can be improved by adjusting operating variables in order to maximize the model responses.

scholarly journals High-efficiency method for recycling lithium from spent LiFePO4 cathode

2020 ◽  
Vol 9 (1) ◽  
pp. 1586-1593
Author(s):  
Tingting Yan ◽  
Shengwen Zhong ◽  
Miaomiao Zhou ◽  
Xiaoming Guo ◽  
Jingwei Hu ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
High Efficiency ◽  
Optical Emission ◽  
Extraction Process ◽  
Emission Spectrometry ◽  
X Ray Diffraction ◽  
Inductively Coupled ◽  
Moisture Analysis ◽  
Lifepo4 Cathode ◽  
Solid Liquid

Abstract The extraction of Li from the spent LiFePO4 cathode is enhanced by the selective removal using interactions between HCl and NaClO to dissolve the Li+ ion while Fe and P are retained in the structure. Several parameters, including the effects of dosage and drop acceleration of HCl and NaClO, reaction time, reaction temperature, and solid–liquid ratio on lithium leaching, were tested. The Total yields of lithium can achieve 97% after extraction process that lithium is extracted from the precipitated mother liquor, using an appropriate extraction agent that is a mixture of P507 and TBP and NF. The method also significantly reduced the use of acid and alkali, and the economic benefit of recycling is improved. Changes in composition, morphology, and structure of the material in the dissolution process are characterized by inductively coupled plasma optical emission spectrometry, scanning electron microscope, X-ray diffraction, particle size distribution instrument, and moisture analysis.

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