scholarly journals EKSTRAKSI TANIN DARI KULIT KAYU AKASIA DENGAN MENGGUNAKAN MICROWAVE: PENGARUH DAYA MICROWAVE, WAKTU EKSTRAKSI DAN JENIS PELARUT

2017 ◽  
Vol 6 (3) ◽  
pp. 52-57
Author(s):  
Iriany ◽  
Florentina Pandiangan ◽  
Christina Eka P
Keyword(s):  
Atomic Absorption ◽  
Adsorption Capacity ◽  
Microwave Power ◽  
Polar Solvent ◽  
Extraction Time ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Power Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

Tannin is one of complex polyphenol compound which soluble in polar solvent. Tannin could be extracted from acacia bark. This study aims to examine microwave-assisted extraction of tannins under influence of microwave power, extraction time, and solvent and its application to adsorb Cd and Cu. Tannin was extracted from acacia bark with feed-to-solvent ratio (1:20 g/ml). Power of microwave was adjusted 100 W, 180 W, 300 W, 450 W, and 600 W for 1 minute, 3 minutes and 5 minutes respectively using aquadest and ethanol as the solvent. The extracts were analyzed using UV-Vis spectrophotometer. Furthermore, the extract with the highest yield of tannins are used as the adsorbent. The concentration of Cd and cu were analyzed using Atomic Absorption Spectrophotometer. The result showed the highest yield of tannin 26.606 mg/g at 100 W and 3 minutes extraction time using ethanol as the solvent. The result showed that the adsorption capacity of adsorbent from tannin was 3.81 mg/g and 2.26 mg/g for Cd and Cu respectively.

Response Surface Optimization of Microwave-Assisted Extraction Conditions of Anthocyanins from Black Soybean Hull

2013 ◽  
Vol 395-396 ◽  
pp. 672-677
Author(s):  
Yi Hua Jiang ◽  
Xin Long Jiang
Keyword(s):  
Microwave Power ◽  
Ethanol Concentration ◽  
Extraction Time ◽  
Microwave Assisted Extraction ◽  
Black Soybean ◽  
Soybean Hull ◽  
Power Extraction ◽  
Microwave Assisted ◽  
Response Surface Optimization ◽  
Assisted Extraction

Surface response optimization of microwave-assisted extraction (MAE) conditions of anthocyanins from black soybean hull with the factors of ethanol concentration, microwave power, extraction time, solid/liquid ratio (g:mL) on the yield of anthocyanin were studied. The results showed that ethanol concentration and ratio of liquid to solid had most important influence; the interaction of ethanol concentration and ratio of liquid to solid,interaction of microwave power and extraction time had significant influence on extraction anthocyanins from black soybean hull. The optimum extracting conditions of anthocyanin from black soybean hull were as follows: adding 1:40.00 (m:v) of 60.35% alcohol (pH2.0) and extracting for 74.26 s under the power of 237.86 W.

scholarly journals Microwave-assisted extraction of non-polar compounds from pistachio hull and characterization of extracts

2018 ◽  
Vol 69 (3) ◽  
pp. 260 ◽  
Author(s):  
H. N. Özbek ◽  
D. Koçak Yanık ◽  
S. Fadıloğlu ◽  
H. Keskin Çavdar ◽  
F. Göğüş
Keyword(s):  
Microwave Power ◽  
Polar Compounds ◽  
Good Alternative ◽  
Tocopherol Content ◽  
Extraction Time ◽  
Total Phenolic ◽  
Microwave Assisted Extraction ◽  
Solid Ratio ◽  
Microwave Assisted ◽  
Assisted Extraction

Soxhlet and microwave assisted extraction (MAE) methods were used to obtain non-polar compounds from pistachio hull. MAE parameters (liquid to solid ratio, microwave power, and extraction time) were studied to obtain maximum extraction yield. The optimal conditions were found to be liquid to solid ratio of 15:1 (v/w), microwave power of 250 W and extraction time of 12.5 min. The extraction yields were 9.81 and 9.50% for MAE and Soxhlet methods, respectively. The total phenolic content, antioxidant activity and tocopherol content of the extract obtained by MAE was found to be significantly higher than those of the Soxhlet extract (p < 0.05). The results showed that the extract contained α-tocopherols (567.65 mg/kg) and oleic acid (48.46%) as the major tocopherols and fatty acids. These findings propose that hull extracts can be considered as a good source of natural bioactive compounds and MAE can be a good alternative to the traditional Soxhlet method.

scholarly journals Effects of Microwave-Assisted Extraction Conditions on Antioxidant Capacity of Sweet Tea (Lithocarpus polystachyus Rehd.)

Antioxidants ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 678
Author(s):  
Ao Shang ◽  
Min Luo ◽  
Ren-You Gan ◽  
Xiao-Yu Xu ◽  
Yu Xia ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Microwave Power ◽  
Ethanol Concentration ◽  
Extraction Time ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Optimal Conditions ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Sample Ratio

In this study, the effects of microwave-assisted extraction conditions on antioxidant capacity of sweet tea (Lithocarpus polystachyus Rehd.) were studied and the antioxidants in the extract were identified. The influences of ethanol concentration, solvent-to-sample ratio, microwave power, extraction temperature and extraction time on Trolox equivalent antioxidant capacity (TEAC) value, ferric reducing antioxidant power (FRAP) value and total phenolic content (TPC) were investigated by single-factor experiments. The response surface methodology (RSM) was used to study the interaction of three parameters which had significant influences on antioxidant capacity including ethanol concentration, solvent-to-sample ratio and extraction time. The optimal conditions for the extraction of antioxidants from sweet tea were found as follows—ethanol concentration of 58.43% (v/v), solvent-to-sample ratio of 35.39:1 mL/g, extraction time of 25.26 min, extraction temperature of 50 ℃ and microwave power of 600 W. The FRAP, TEAC and TPC values of the extract under the optimal conditions were 381.29 ± 4.42 μM Fe(II)/g dry weight (DW), 613.11 ± 9.32 μM Trolox/g DW and 135.94 ± 0.52 mg gallic acid equivalent (GAE)/g DW, respectively. In addition, the major antioxidant components in the extract were detected by high-performance liquid chromatography with diode array detection (HPLC-DAD), including phlorizin, phloretin and trilobatin. The crude extract could be used as food additives or developed into functional food for the prevention and management of oxidative stress-related diseases.

Optimization of Microwave-Assisted Extracting of Proanthocyanidins from Purple Cabbage and Evaluation of Antioxidant Activity In Vitro

2012 ◽  
Vol 490-495 ◽  
pp. 3500-3504 ◽  
Author(s):  
Song Lin Li ◽  
Xiao Ming Chen ◽  
Jing Lin
Keyword(s):  
Microwave Power ◽  
Extraction Time ◽  
Power Extraction ◽  
Solid Ratio ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Layer Chromatography ◽  
Optimum Extraction ◽  
Central Composite

A central composite rotatable design combined with response surface methodology was employed to study the effect of microwave assisted extraction (MAE) conditions namely microwave power, extraction time, liquid-solid ratio and ethanol proportion on the proanthocyanidins extraction from purple cabbage. The optimum extraction conditions were as follows: microwave power, 260 W; extraction time, 54s; liquid to solid ratio, 43; and ethanol concentration, 57%. The results showed proanthocyanidins had a significant effect on scavenging of DPPH radicals. At last, proanthocyanidins were identified by thin layer chromatography.

Microwave-Assisted Extraction and In Vitro Antioxidant Evaluation of Polysaccharides from Enteromorpha prolifera

2011 ◽  
Vol 79 ◽  
pp. 204-209 ◽  
Author(s):  
Bin Wang ◽  
Guo Zhong Tong ◽  
You Le Qu ◽  
Li Li
Keyword(s):  
Microwave Power ◽  
Radical Scavenging ◽  
Hot Water ◽  
Butylated Hydroxytoluene ◽  
Extraction Time ◽  
Microwave Assisted Extraction ◽  
Enteromorpha Prolifera ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Liquid Material

An efficient microwave-assisted extraction (MAE) technique was developed to extract polysaccharides from Enteromorpha prolifera (PEP). The operating parameters, such as microwave power, liquid/material ratio, temperature and extraction time, were optimized using orthogonal array design coupled with single factor method. PEP yield was determined by the phenol-sulfuric acid method. The optimum extraction conditions were determined as follows: microwave power, 700 W; liquid/material ratio, 40:1 (mL/g); temperature, 70 °C; and extraction time, 25 min. Under such conditions, PEP yield reached to 10.79 %. In comparison with conventional hot water extraction and ultrasonic-assisted extraction, MAE showed obvious advantages in terms of high extraction efficiency, saving energy, rapidity, solvent consumption, and so on. The data demonstrated that MAE could be a fast and reliable method for quantitative analysis of PEP. The scavenging capability of PEP to DPPH/hydroxyl radical reached to 65.2 % and 41.2 % at the concentration of 0.5 mg/mL. The reducing power of PEP was 0.354. Compared with butylated hydroxytoluene (BHT) and gallic acid (GA), the experimental results showed that DPPH radical scavenging activity of PEP was higher than that of BHT. Thus, PEP had good potential as a natural antioxidant used in functional food or medicine industries.

scholarly journals Microwave-assisted extraction of phenolic compounds from Moringa oleifera seed as anti-biofouling agents in membrane processes

2018 ◽  
Vol 204 ◽  
pp. 03003 ◽  
Author(s):  
Ni'matul Izza ◽  
Shinta Rosalia Dewi ◽  
Ashried Setyanda ◽  
Agung Sukoyo ◽  
Panggulu Utoro ◽  
...  
Keyword(s):  
Moringa Oleifera ◽  
Phenolic Content ◽  
Extraction Time ◽  
Total Phenolic ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Purification Process ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Moringa Oleifera Seed

Moringa seed has known as a coagulant in the water purification process. It is because of the large amount of anti-microbial compounds contained in it. Phenol is one of the most common anti-microbial compounds found in natural materials. The aim of this study was to determine the total phenolic content (TPC) of Moringa seed which was extracted by Microwave-Assisted Extraction (MAE). Moringa seeds were characterized by FTIR and showed that it contained phenol compounds confirmed by specific peak in some areas. Moringa seeds were characterized by FTIR before extracted. Therefore, MAE was performed by variation of solvent ratios (1: 4, 1: 6, 1: 8) and extraction time (2, 3, 4 min). The highest TPC of 41.78 mg GAE / g dw was reached at 1: 8 solvent ratio and 3-min extraction time.

scholarly journals Optimization of the Vacuum Microwave Assisted Extraction of the Natural Polyphenols and Flavonoids from the Raw Solid Waste of the Pomegranate Juice Producing Industry at Industrial Scale

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1033
Author(s):  
Konstantinos Petrotos ◽  
Ioannis Giavasis ◽  
Konstantinos Gerasopoulos ◽  
Chrysanthi Mitsagga ◽  
Chryssoula Papaioannou ◽  
...  
Keyword(s):  
Solid Waste ◽  
Microwave Power ◽  
Extraction Time ◽  
Pomegranate Juice ◽  
Industrial Scale ◽  
Microwave Assisted Extraction ◽  
Total Polyphenols ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Vacuum Microwave

Pomegranate pomace (PP) is the solid waste produced in bulk by the pomegranate juice industry which is rich in polyphenols and flavonoids that can replace the hazardous chemical antioxidants/antimicrobials currently used in the agro-food and cosmetics sectors. In the present work, the vacuum microwave assisted extraction (VMAE) of natural antioxidants from raw pomegranate pomace was investigated and successfully optimized at an industrial scale. For the optimization of PP VMAE a novel, highly accurate response surface methodology (RSM) based on a comprehensive multi-point historical design was employed. The optimization showed that the maximum recovery of PP total polyphenols as well as total PP flavonoids were obtained at microwave power = 4961.07 W, water to pomace ratio = 29.9, extraction time = 119.53 min and microwave power = 4147.76 W, water to pomace ratio = 19.32, extraction time = 63.32 min respectively. Moreover, the optimal VMAE conditions on economic grounds were determined to be: microwave power = 2048.62 W, water to pomace ratio = 23.11, extraction time = 15.04 min and microwave power = 4008.62 W, water to pomace ratio = 18.08, extraction time = 15.29 min for PP total polyphenols and PP total flavonoids respectively. The main conclusion of this study is that the VMAE extraction can be successfully used at industrial scale to produce, in economic manner, high added value natural extracts from PP pomace.

Microwave-Assisted Extraction of Andrographolide, 14-Deoxy-11,12- didehydroandrographolide and Neoandrographolide from Andrographis paniculata: An Optimisation Study

2020 ◽  
Vol 16 (9) ◽  
pp. 1318-1325 ◽  
Author(s):  
Vi V. Chia ◽  
Sook F. Pang ◽  
Sureena Abdullah ◽  
Mashitah M. Yusoff ◽  
Jolius Gimbun
Keyword(s):  
Regression Analysis ◽  
Microwave Power ◽  
Ethanol Concentration ◽  
Mesh Size ◽  
Andrographis Paniculata ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Central Composite

Background: Andrographis paniculata is often used as functional foods owing to its broad range of pharmaceutical activities due to the presence of main terpene compounds such as andrographolide, 14-deoxy-11,12-didehydroandrographolide and neoandrographolide. The aforementioned compounds must be extracted from the plant material before it can be routinely used as a functional food ingredient. Objective: This work presents an optimisation study of microwave-assisted extraction (MAE) of terpene from Andrographis paniculata. In this study, two factors at three-level central composite face centred design was employed to optimise the process variables, including the effect of microwave power (75-175 W) and ethanol concentration (20-85%) on extraction of terpene from Andrographis paniculata. Methods: The experimental design was set based on initial screening on the effect of mesh size and solid solvent ratio. The present work was performed at fixed mesh size and solid solvent ratio, which corresponds to the highest yield established experimentally. Two most significant factors, i.e. microwave power and ethanol concentration was chosen and further studied for optimisation using a response surface methodology. The three-level, two-factor central composite design (CCD) has been employed to determine the effect of microwave power (15, 25 and 35 W/mL) and ethanol concentration (20, 52.5 and 85%) on the yield of terpene extraction. Identification and quantification of the terpene were performed via Ultra-Performance Liquid Chromatography- Photodiode Array (UPLCPDA). Results: The regression analysis showed good fit of the experimental data to the quadratic equation with coefficient of determination (R2) value of 0.997. The optimum condition was found at microwave power of 140 W with 85% ethanol concentration, produced the highest yield of andrographolide (10.926 ± 0.053 mg/g DW), 14-deoxy-11,12-didehydroandrographolide (4.336 ± 0.215 mg/g DW) and neoandrographolide (5.698 ± 0.252 mg/g DW). The model developed through response surface modelling has a desirability of 97.5% and the error between the experiment and the model predictions ranged from 2.4 to 5.2%. Conclusion: A successful optimisation of terpene extraction from A. paniculata via MAE was achieved at microwave power of 140 W and 85% ethanol. The model developed from the regression analysis is sufficiently accurate and can be used to predict the yield of terpene extraction from A. paniculata.

scholarly journals Simultaneous Optimization of Microwave-Assisted Extraction of Phenolic Compounds and Antioxidant Activity of Avocado (Persea americana Mill.) Seeds Using Response Surface Methodology

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Alexander Weremfo ◽  
Felix Adulley ◽  
Martin Adarkwah-Yiadom
Keyword(s):  
Antioxidant Activity ◽  
Response Surface Methodology ◽  
Phenolic Compounds ◽  
Response Surface ◽  
Microwave Power ◽  
Ethanol Concentration ◽  
Extraction Time ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

This study was designed to optimize three microwave-assisted extraction (MAE) parameters (ethanol concentration, microwave power, and extraction time) of total phenolics, total flavonoids, and antioxidant activity of avocado seeds using response surface methodology (RSM). The predicted quadratic models were highly significant (p<0.001) for the responses studied. The extraction of total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activity was significantly (p<0.05) influenced by both microwave power and extraction time. The optimal conditions for simultaneous extraction of phenolic compounds and antioxidant activity were ethanol concentration of 58.3% (v/v), microwave power of 400 W, and extraction time of 4.8 min. Under these conditions, the experimental results agreed with the predicted values. MAE revealed clear advantages over the conventional solvent extraction (CSE) in terms of high extraction efficiency and antioxidant activity within the shortest extraction time. Furthermore, high-performance liquid chromatography (HPLC) analysis of optimized extract revealed the presence of 10 phenolic compounds, with rutin, catechin, and syringic acid being the dominant compounds. Consequently, this optimized MAE method has demonstrated a potential application for efficient extraction of polyphenolic antioxidants from avocado seeds in the nutraceutical industries.

Optimization of Microwave-Assisted Extraction of Polysaccharides from Panax japlcus Var

2013 ◽  
Vol 774-776 ◽  
pp. 919-922
Author(s):  
Xiao Song ◽  
Peng Zhao
Keyword(s):  
Microwave Power ◽  
Extraction Yield ◽  
Operating Conditions ◽  
Raw Material ◽  
Extraction Time ◽  
Microwave Assisted Extraction ◽  
Box Behnken Design ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Optimum Extraction

Polysaccharide fromPanax japlcus var(PJVPs) was extracted with microwave-assisted (MAE). The effects of operating conditions, such as extraction time, ratio of water to raw material , and microwave power, on the extraction yield of PJVPs were studied through a Box-Behnken design (BBD). The optimum extraction conditions were as follows: extraction time 9.14 min, power 728.5 W and ratio of water to raw material 27.57ml/g. The yield of polysaccharide was 14.02 % based on the above mentioned conditions.

Sign in / Sign up

Export Citation Format

Share Document