scholarly journals Effects of Microwave Power on Extraction Kinetic of Anthocyanin from Blueberry Powder considering Absorption of Microwave Energy

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Hongkun Xue ◽  
Hao Xu ◽  
Xiaorui Wang ◽  
Liuyang Shen ◽  
Han Liu ◽  
...  
Keyword(s):  
Cell Wall ◽  
Microwave Power ◽  
Microwave Energy ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Electrical Field ◽  
Extraction Solvent ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Simulation Results

Microwave power as directly controlled parameter determines the absorption of microwave energy inside extraction vial and the yield of objective component in microwave-assisted extraction (MAE). The aim of this study was to elucidate the effects of microwave powers on the yield of anthocyanin from blueberry (Vaccinium spp.) powder based on the absorption of microwave energy in extracts under MAE. Rising microwave powers have little effect on the distribution of microwave energy in extraction vial, but increase its temperature. The simulation results indicated that strength of electrical field tends to decay trend along with microwave irradiation; however, temperatures have the highest level in center location in an extraction vial. High microwave power strongly breaks cell wall of blueberry to open diffusion route of interior anthocyanin toward extraction solvent. A critical extraction temperature of 50.75±0.88°C is obtained with the highest anthocyanin yield under MAE. Three monomers of anthocyanin including pelargonidin, cyanidin, and delphinidin are, respectively, of the highest content of 1.02 μg/mL, 0.66 μg/mL, and 0.31 μg/mL. The research results contribute to the improvement of efficiency of microwave energy and yield of anthocyanin.

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.

scholarly journals Influences of Microwave-Assisted Extraction Parameters on Antioxidant Activity of the Extract from Akebia trifoliata Peels

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1432
Author(s):  
Min Luo ◽  
Dan-Dan Zhou ◽  
Ao Shang ◽  
Ren-You Gan ◽  
Hua-Bin Li
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Microwave Power ◽  
Ethanol Concentration ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Extraction Parameters

Akebia trifoliata is a fruit with rich nutritional properties, and its peel is produced as a by-product. In this research, we investigated the influences of microwave-assisted extraction parameters on antioxidant activity of the extract from Akebia trifoliata peels, and the ferric-reducing antioxidant power (FRAP) and Trolox equivalent antioxidant capacity (TEAC) as well as total phenolic contents (TPC) were used to optimize extraction parameters. The influences of ethanol concentration, microwave power and solvent-to-material ratio, as well as extraction temperature and time on TPC, FRAP and TEAC values, were assessed using single-factor tests. Three parameters with obvious effects on antioxidant capacity were selected to further investigate their interactions by response surface methodology. The optimal extraction parameters of natural antioxidants from Akebia trifoliata peels were ethanol concentration, 49.61% (v/v); solvent-to-material ratio, 32.59:1 mL/g; extraction time, 39.31 min; microwave power, 500 W; and extraction temperature, 50 °C. Under optimal conditions, the FRAP, TEAC and TPC values of Akebia trifoliata peel extracts were 351.86 ± 9.47 µM Fe(II)/g dry weight (DW), 191.12 ± 3.53 µM Trolox/g DW and 32.67 ± 0.90 mg gallic acid equivalent (GAE)/g DW, respectively. Furthermore, the main bioactive compounds (chlorogenic acid, rutin and ellagic acid) in the extract were determined by high-performance liquid chromatography. The results are useful for the full utilization of the by-product from Akebia trifoliate fruit.

scholarly journals Product Quality of Quercetin Extract From Carica Papaya L Flower by Microwave-Assisted Extraction (MAE)

2019 ◽  
Vol 14 (2) ◽  
pp. 139-146
Author(s):  
Iman Mukhaimin ◽  
Enggar Ayu Saraswati ◽  
Rahma Ajizah ◽  
Meilya Suzan Triyastuti
Keyword(s):  
Product Quality ◽  
Microwave Power ◽  
Carica Papaya ◽  
Extraction Time ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Group Function ◽  
Microwave Assisted ◽  
Assisted Extraction

These work aims are to determine the best condition extraction and product quality of quercetin from Carica papaya L flowers extract. The extraction of quercetin from Carica papaya L flowers had done by microwave-assisted extraction (MAE) method.  Dried flowers prepared by cutting into 0,125 mm of particle size. Dried flowers were extracted using methanol 80% (w/w) to determine  influence of solid to liquid, S/L, ratio (1:10, 1:15, 1:20), microwave power (120, 200, 280, 400 W), and extraction time (1-5 minutes) on extraction process. Using the phytochemical test by Mg-HCl-amyl alcohol and UV-Vis spectrophotometer techniques, the quercetin detected by qualitative and quantitative analysis. As a result, the presence of flavonoids detected by the formation of a brownish red-colored flavylium compound.  Increasing extraction time, power, and S/L ratio increased the extraction temperature. Consequently, yield quercetin decreased when the temperature extraction exceeds its temperature degradation. The highest quercetin yield, 0.214%, was detected with solid to liquid ratio (1:15), microwave power (400 Watt), and extraction time (4 minutes). FTIR spectrophotometer technique on the highest yield quercetin proved that have product quality with 91,17% similarity on group function like –OH, C=O, C=C, and C-H with quercetin standard spectrum.

Ultrasound-Microwave Assisted Extraction and Separation of Ricinus communis Allergen from Castor Bean Meal

2013 ◽  
Vol 781-784 ◽  
pp. 721-725
Author(s):  
Ai Lin Zhang ◽  
Chang Lu Wang ◽  
Yu Feng Hu ◽  
Zhi Jiang Zhou
Keyword(s):  
Microwave Power ◽  
Castor Bean ◽  
Ricinus Communis ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Extraction And Separation ◽  
Microwave Assisted ◽  
Ricinus Communis L ◽  
Assisted Extraction ◽  
Bean Meal

The influence of ultrasound-microwave during extraction of Ricinus communis(L）allergen from castor bean meal (CBM) was investigated. The method was successfully applied for the ultrasound- microwave assisted extraction (UME) of allergen from CBM. The corresponding extraction parameters including the extraction temperature, ultrasonic-microwave power and extraction time were investigated. The CBM was crushed, sifted, ground and suspended for 4 h in 25% ethanol water (1:4) at room temperature followed by ultrasound-microwave. The yield, polysaccharose and protein contents were determined after each processing step. The purity of extracted allergen was tested through HPLC and the Sephadex G-100 and Tricine-SDS-PAGE detection with unique electrophoresis strip documented that allergen was purifed.. The paper describes the conditions of the temperature,time,and microwave-power for the method reliability with UME and suitablilty for the effective extraction of allergen from CBM.

scholarly journals Microwave-Assisted Extraction of Ricinine from Ricinus communis Leaves

Antioxidants ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 438
Author(s):  
Liliane Nebo ◽  
Rosa M. Varela ◽  
João B. Fernandes ◽  
Miguel Palma
Keyword(s):  
Ricinus Communis ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Extraction Solvent ◽  
Solid Ratio ◽  
Microwave Assisted ◽  
Bioactive Properties ◽  
Assisted Extraction ◽  
The Stability ◽  
Sample Ratio

The alkaloid ricinine (3-cyano-4-methoxy-N-methyl-2-pyridone) is found in different parts of the Ricinus communis plant and is known to possess several bioactive properties, including strong antioxidant activity. In this study, a new microwave-assisted extraction (MAE) method was developed for the recovery of ricinine from R. communis leaves. The extraction variables studied were extraction temperature (between 125 °C and 175 °C), microwave power (between 500 W and 1000 W), extraction time (between 5 min and 15 min), extraction solvent (between 10% and 90% of EtOAc in MeOH), and solvent-to-sample ratio (between 25:1 mL and 50:1 mL of solvent per gram of the sample). On studying the effects of extraction variables, both solvent and liquid-to-solid ratio were found to exhibit the highest effects on ricinine recovery. A fast (15 min) microwave-assisted extraction method was developed (high temperatures can be applied because the stability of ricinine is proven in the literature), allowing for the recovery of ricinine from R. communis leaves. The study revealed that R. communis leaves had almost 1.5 mg g−1 (dried weight) of ricinine.

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.

scholarly journals Deep Eutectic Solvent-Based Microwave-Assisted Extraction of Baicalin from Scutellaria baicalensis Georgi

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Hui Wang ◽  
Xiaodi Ma ◽  
Qibin Cheng ◽  
Xiaoli Xi ◽  
Liwei Zhang
Keyword(s):  
Maximum Yield ◽  
Deep Eutectic Solvent ◽  
Extraction Yield ◽  
Scutellaria Baicalensis ◽  
Molar Ratio ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Scutellaria Baicalensis Georgi ◽  
Microwave Assisted ◽  
Assisted Extraction

Deep eutectic solvents (DESs) have attracted significant attention as green media for the extraction and separation of natural compounds from Chinese medicine. In this study, a hydrophobic DESs-based microwave-assisted extraction (MAE) was successfully used to efficiently extract baicalin from Scutellaria baicalensis Georgi. Firstly, DecA: N4444-Cl (DES-1 , molar ratio 1 : 2) was screened and selected as the most appropriate DES by comparing the extraction yield in different hydrophobic DESs. Based on the extraction yield of baicalin, response surface methodology (RSM) was employed to model and optimize the parameters (extraction temperature, liquid-solid ratio, and extraction time). Furthermore, the maximum yield of 106.96 mg·g−1 was achieved under optimum conditions in DES-containing aqueous solutions (33 vol% water content), which reached a similar level that was conducted using the pharmacopoeia procedure (104.94 mg·g−1). These results indicated that the proposed method is an excellent alternative for the extraction of baicalin.

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 Rapid Method for the Determination of Organochlorine Pesticides and PCBs in Fish Muscle Samples by Microwave-Assisted Extraction and Analysis of Extracts by GC-ECD

2010 ◽  
Vol 93 (6) ◽  
pp. 1987-1994 ◽  
Author(s):  
Angelika M Wilkowska ◽  
Marek Biziuk
Keyword(s):  
Organochlorine Pesticides ◽  
Fish Muscle ◽  
Food Samples ◽  
Fat Content ◽  
Clupea Harengus ◽  
Microwave Assisted Extraction ◽  
Extraction Solvent ◽  
Microwave Assisted ◽  
Assisted Extraction

Abstract A procedure for the multiresidue determination of organochlorine pesticides and polychlorinated biphenyls in fish muscle samples has been developed. The method is based on the microwave-assisted extraction (MAE) of food samples from an acetonitrilewater (95 5, v/v) mixture followed by SPE cleanup of the extracts and analysis by GC with an electron capture detector. MAE operational parameters, such as the extraction solvent, temperature, and time, were optimized with respect to the extraction efficiency of the target compounds from food samples with 1013 fat content. The chosen extraction technique allows reduction of the solvent consumption and extraction time when compared with methods already used. Acetonitrile is a good extraction solvent for low-fat matrixes (220 fat content), such as fish samples, because it does not significantly dissolve the highly polar proteins, salts, and sugars commonly found in food and gives high recoveries of a wide polarity range of analytes. For purification, SPE using LC-Florisil was shown to be sufficient for the removal of coextracted substances. Recoveries &gt;78 with RSD values &lt;15 were obtained for all compounds under the selected conditions. Method quantification limits were in the 510 g/kg range. The method was applied to the analysis of samples of herring (Clupea harengus) purchased at the local fish market. The method is rapid and reliable for the determination of organochlorine analytes in fish muscle.

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