scholarly journals Microwave-assisted Extraction of Natural Dyes from Coleus atropurpureus Leaves: The Effect of Solvent

2018 ◽  
Vol 156 ◽  
pp. 06011 ◽  
Author(s):  
Selfina Gala ◽  
Sumarno Sumarno ◽  
Mahfud Mahfud
Keyword(s):  
Natural Dyes ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Optimal Conditions ◽  
Microwave Assisted ◽  
Water Solvent ◽  
Assisted Extraction ◽  
Irradiation Power ◽  
Major Chemical ◽  
Chemical Groups

A microwave-assisted extraction system was used to extract natural dyes from Coleus atropurpureus leaves. The effects of water solvent of the temperature at 100°C and 80°C as well as ethanol solvent 96% were investigated. This is done at the various material to solvent ratio (0.001, 0.0025, 0.005 g/mL) and microwave power (264, 400, 600 watt). The optimal conditions of the extraction were obtained on a water solvent of the temperature at 100°C with material to solvent ratio 0.001 g/mL, irradiation power 400 watt, extraction time 10 min, material size 35-60 mesh, the optimum yield of 44.48%. Identification of groups of pigments contained in the Coleus atropurpureus leaves is known categories tannins and flavonoids. Fourier Transform Infrared Spectroscopy was used to identify the major chemical groups in the extracted dyes.

scholarly journals Optimization of Commercial Microwave Assisted-Extraction Conditions for Recovery of Phenolics from Lemon-Scented Tee Tree (Leptospermum petersonii) and Comparison with Other Extraction Techniques

Foods ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 50
Author(s):  
Md Saifullah ◽  
Taiwo Olusesan Akanbi ◽  
Rebecca McCullum ◽  
Quan Van Vuong
Keyword(s):  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Plant Materials ◽  
Soaking Time ◽  
Tea Tree ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Irradiation Power ◽  
The Impact ◽  
Radiation Time

The lemon-scented tea tree (LSTT) is an Australian native herb and is a rich source of essential oil and phenolics. The ETHOS X extraction system is known as a commercial microwave-assisted extraction (MAE) system for extracting bioactive compounds from plant materials. This study investigated the influence of soaking time, radiation time, microwave power, and sample to solvent ratio on the extraction efficiency of polyphenols and antioxidant properties from lemon-scented tea tree leaves and optimized the extraction conditions using response surface methodology (RSM). The effectiveness of ETHOS X was further compared with ultrasound-assisted extraction (UAE) and shaking water bath (SWB) techniques. The results revealed that soaking time did not significantly affect the recovery of phenolics from the leaves (p > 0.05). Thus, soaking is not required for the ETHOS X extraction of polyphenols from LSTT leaves. RSM was successfully applied to explore the impact of ETHOS X extraction conditions and optimize the extraction conditions. Radiation time significantly affects the recovery yield of phenolics (p < 0.05) positively, whereas irradiation power and sample to solvent ratio adversely influenced the extraction yields of phenolics. The optimal ETHOS X extraction conditions were: radiation time of 60 min, irradiation power of 600 W, and sample to solvent ratio of 2 g/100 mL. Under these conditions, 119.21 ± 7.09 mg of phenolic, 85.31 ± 4.55 mg of flavonoids, and 137.51 ± 12.52 mg of proanthocyanidins can be extracted from a gram of dried LSTT leaves. In comparison with UAE and SWB, ETHOS X is not more effective for the extraction of phenolics than UAE and SWB. However, this technique can save half of the solvent volume compared to UAE and SWB techniques.

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 Ekstraksi Polifenol Total dari Daun Kadamba (Mitragyna speciosa Korth) Menggunakan Metode Choline Chloride-Sorbitol based Microwave Assisted Extraction

2019 ◽  
Vol 10 ◽  
pp. 131-134
Author(s):  
Ramila Hidayati ◽  
Dewi Rahmawati ◽  
Islamudin Ahmad
Keyword(s):  
Choline Chloride ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Green Solvent ◽  
Microwave Assisted ◽  
Extract Solution ◽  
Mitragyna Speciosa ◽  
Assisted Extraction ◽  
Total Extraction

This research was conducted to determine the influence of the use of the choline chloride-sorbitol based microwave assisted extraction (MAE) method against the total extraction of polyphenols from the leaf Kadamba (Mitragyna speciosa Korth). Simplisia extracted using solvent (green solvent) choline chloride-sorbitol with a ratio of 1:1; 1:2 and 1:3 g/g with sample and solvent ratio of 1:10 g/mL, microwave strength is 50% watt and performed for 10 minutes, the extract solution has been obtained and then done determination of total levels of polyphenols by using folin ciocalteu reagents and further measured its absorption with the UV-VIS spectrophotometer device at a wavelength of 770 nm. Based on the results of the study, obtained the levels of polyphenols from each comparison of solvent used against the sample of 334 mg of GAE/g samples (1:1 g/g solvent); 372 mg GAE/g samples (1:2 g/g solvents) and 299 mg of GAE/g samples (1:3 g/g solvents). Based on the results of the study can be concluded that the method of choline chloride-sorbitol based microwave assisted extraction (MAE) can be used to extract the polyphenols from Kadamba leaves easily, quickly and efficiently.

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 Optimisation of microwave-assisted extraction of flavonoids and phenolics from celery (Apium graveolens L.) leaves by response surface methodology

2016 ◽  
Vol 34 (No. 4) ◽  
pp. 341-349 ◽  
Author(s):  
Q. He ◽  
Y. Li ◽  
P. Zhang ◽  
A. Zhang ◽  
H. Wu
Keyword(s):  
Antioxidant Activity ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Ethanol Concentration ◽  
Apium Graveolens ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Inhibition Rate ◽  
Microwave Assisted ◽  
Assisted Extraction

The conditions for microwave-assisted extraction (MAE) of total flavonoids (TF) and total phenols (TP), and antioxidant activity from celery (Apium graveolens L.) leaves by response surface methodology (RSM) were optimised. The 3-level, 3-factorial Box-Behnken design (BBD) was employed to study three main extraction conditions: microwave power (300–500 W), solid-solvent ratio (15–30 ml/g), and ethanol concentration (50–80%). It was found that microwave power of 500 W at 30 ml/g solid-solvent ratio with 75.6% (v/v) ethanol concentration was the most optimum conditions for the extraction of TF and TP from celery leaves with the consequent high antioxidant activity measured by the DPPH inhibition rate. Using the optimum extraction conditions, the extraction yields of TF and TP were 0.62 g RUE/100 g DW, 3.01 g GAE/100 g DW, respectively, and the DPPH inhibition rate was 88%. The results indicated that the nutritional quality of celery (Apium graveolens L.) leaves could be improved significantly by optimising the extraction process of MAE using response surface methodology.

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.

scholarly journals Optimization of Anthocyanin Extraction from Cockspur Coral (Erythrina Crista-Galli L.) Petals with Microwave-Assisted Extraction (MAE) using Response Surface Methodology

2021 ◽  
Vol 21 (2) ◽  
pp. 143
Author(s):  
Astrilia Damayanti ◽  
Bayu Triwibowo ◽  
Megawati Megawati ◽  
Miftahuddin Azhari ◽  
Sandra Anggita Fadriana
Keyword(s):  
Response Surface ◽  
Extraction Process ◽  
Operating Conditions ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Surface Method ◽  
Assisted Extraction ◽  
Order Polynomial ◽  
Independent Variable

Cockspur coral (Erythrina crista-galli L) petals are flowers that contain anthocyanins and active compounds of flavonoids and tannins. This study aims to determine the optimum conditions for the anthocyanin extraction process of cockspur coral petals using Microwave-Assisted Extraction (MAE), analyzed through the Response Surface Method (RSM). This process uses ethanol-hydrochloric acid solvents and a Box-Behnken experimental design involving three factors, namely the solvent ratios (w/v) (1:5, 1:15, and 1:25), microwave powers (300, 450, and 600 watts), and extraction times (3, 9, and 15 minutes). As a result, the second-order polynomial model was enhanced and sufficient to explain the variation of the data that denoted the significant correlation with the independent variables and the response. Derringer's desired function methodology was used for optimizing studies and generated ideal conditions for each or combined an independent variable.  The optimum anthocyanin extract of 5.82 mg/L was obtained at a power condition of 325,5 Watts, an extraction time of 3.05 minutes, and a solvent ratio of 20.5. Meanwhile, the operating conditions at a power of 310.8 Watts, a time of 14.94 minutes, and a solvent ratio of 24.96 resulted in the optimum color intensity (IC) of 1040.26. In the meantime, the optimum antioxidant activity was obtained at a power of 585.97 Watts, a time of 4.93 minutes, and a solvent ratio of 5.43 with IC50 of 0.115.

Optimization of Microwave-Assisted Extraction Process by Response Surface Methodology of Natural Anthocyanins from Rhodomyrtus tomentosa (Ait.) Hassk

2019 ◽  
Vol 298 ◽  
pp. 94-99
Author(s):  
Tri Nhut Pham ◽  
Huynh Thi Kieu Linh ◽  
Anh Quoc Ngo ◽  
Hoang Le Tuan Anh ◽  
Tri Duc Lam ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Extraction Process ◽  
Anthocyanin Content ◽  
Microwave Assisted Extraction ◽  
Optimal Conditions ◽  
Box Behnken Design ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Proposed Model ◽  
Rhodomyrtus Tomentosa

Rhodomyrtus tomentosa (Ait.) Hassk is a fruit that is gradually becoming popular in Vietnam with superior bioactive compounds. This study aimed to determine the natural anthocyanins from Rhodomyrtus tomentosa (Ait.) Hassk based on extracts and optimized RSM. The Box-Behnken design was shown the influence of the optimal conditions for the MAE procedure are 5.07 min, 206 W and 2.53 g/mL with the optimal anthocyanin content achieved Y = 133.88 mg/L, all reactions are within the threshold of the predicted value. The results are in line with the proposed model for the anthocyanin extraction (R2 = 0.9849).

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.

Study on Microwave-Assisted Extraction Technology of Total Flavonoid from Castor Leaves

2014 ◽  
Vol 1004-1005 ◽  
pp. 868-872
Author(s):  
Yi Hua Jiang ◽  
Xin Long Jiang ◽  
Cheng Gang Cai
Keyword(s):  
Ethanol Concentration ◽  
Orthogonal Experiment ◽  
Total Flavonoids ◽  
Microwave Assisted Extraction ◽  
Extraction Technology ◽  
Power Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Irradiation Power ◽  
Solid Liquid

Orthogonal experiment optimization of microwave-assisted extraction (MAE) conditions of total flavonoids from castor leaves with the factors of ethanol concentration, microwave power, extraction time, solid/liquid ratio on the yield of total flavonoids were studied. The results showed that optimum extracting conditions of total flavonoids from castor leaves were as follows: adding 1:50 g·mL-1 of 40% alcohol and extracting for 3 min,microwave irradiation power 464W. Microwave extraction of total flavonoids from castor leaves is fast, energy saving and high extraction rate.

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