scholarly journals Optimization of Supercritical CO2 Natural Dye Extraction from Brown Seaweed (Sargassum Sp.) via Response Surface Methodology

2018 ◽  
Vol 7 (3.11) ◽  
pp. 105
Author(s):  
Nabila Talib ◽  
Mohd Rozi Ahmad ◽  
Muhammad Ismail Ab Kadir ◽  
Khudzir Ismail ◽  
Ahmad Faiz Che Rahim
Keyword(s):  
Response Surface Methodology ◽  
Methyl Ester ◽  
Response Surface ◽  
Antimicrobial Properties ◽  
Acid Methyl Ester ◽  
Brown Seaweed ◽  
Extraction Yield ◽  
Gas Chromatography Mass Spectrometry ◽  
Hexadecenoic Acid ◽  
Perturbation Plot

This paper discusses the effects of two main parameters (pressure and temperature) in supercritical carbon dioxideextraction of Sargassum sp. through response surface methodology (RSM). Perturbation plot shown significant effects of all process parameters on the yield of extract. An experimental design software was designated to achieve optimization on the process situations pertaining maximum extraction yield. The optimal conditions perceived were at pressure of 4500 psi and temperature of 65°C. The highest yield of extract achieved was 2.7 mg-extract/g-dried sample under the optimum conditions. The yield of extract was then further analysed via Gas Chromatography Mass Spectrometry (GCMS) and it was found that Sargassum sp. contains sterols, pentadecanoic acid, 14-methyl ester, 9-Hexadecenoic acid, methyl ester and phytol which are the constituents of bioactive compounds and antimicrobial properties.  

scholarly journals Pemanfaatan Biji Orok-Orok (Crotalaria juncea) sebagai Bahan Baku Pembuatan Minyak Nabati dengan Metode Ekstraksi Padat-Cair

2020 ◽  
Vol 8 (2) ◽  
pp. 42
Author(s):  
Tiara Puspa Dwi Seta ◽  
Muhammad Muhammad ◽  
Masrullita Masrullita
Keyword(s):  
Response Surface Methodology ◽  
Methyl Ester ◽  
Response Surface ◽  
Myristic Acid ◽  
Acid Methyl Ester ◽  
Undecanoic Acid ◽  
Crotalaria Juncea ◽  
Acid Methyl

ABSTRAKTanaman orok-orok atau Crotalaria juncea L adalah tanaman leguminosa yang termasuk ke dalam keluarga perdu dan semak  Biji orok-orok mengandung  12,6 % minyak dengan 46,8 % asam linoleat, 4,6 % asam linolenat, 28,3 % asam oleat dan 20,3% asam jenuh. Metode yang digunakan adalah metode ekstraksi padat-cair dengan pelarut etanol. Pada penelitian ini dioptimasi menggunakan RSM (Response Surface Methodology). Bahan baku yang digunakan adalah biji orok-orok dan etanol. Biji orok-orok dihaluskan menggunakan blender, kemudian dimasukkan dalam labu leher tiga untuk proses ekstraksi menggunakan pelarut etanol. Ekstraksi dilakukan dengan memvariasikan berat sampel, suhu ekstraksi dan waktu ekstraksi. Dengan variasi berat sampel (70, 80,90 gram),  Suhu (55, 65 dan 75oC), Waktu (3,4 dan 5 jam). Setelah selesai ekstraksi larutan di saring menggunakan kertas saring. Selanjutnya dilakukan pemisahan antara minyak dan pelarut dengan proses destilasi. Pengujian yang dilakukan adalah uji densitas, yield, kadar FFA dan uji komposisi dengan alat GC-MS. Densitas terendah dihasilkan pada Suhu 75oC, berat sampel 70 dan waktu ekstraksi 4 jam sebesar 0,788 g/ml. Yield tertinggi dihasilkan pada suhu 65oC, berat sampel 90 gr dan waktu ekstraksi 3 jam sebesar 19,943 %. Kadar FFA terendah dihasilkan pada suhu 65oC , berat sampel 90 dan waktu 5 jam. RSM memberikan hasil optimasi terbaik pada suhu 75oC, berat sampel 89,64 gram dan waktu ekstraksu 3 jam dengan yield 19,943, densitas 0,89 gr/ml dan kadar FFA 1,2674 %. Dari hasil uji GC-MS diketahui bahwa minyak biji orok-orok mengandung methyl ester of undecanoic acid, 2-methylpentanoic acid, myristic acid methyl ester, methyl linolelaidate, 2-cyclopentylacetohydrazide dan 2-methylpentanoic acid.Kata Kunci : biji orok-orok, ekstraksi, densitas, yield, kadar FFA

scholarly journals Response Surface Methodology for the Optimization of Coco Ethanolamide Production from Coconut Oil

2018 ◽  
Vol 34 (6) ◽  
pp. 3030-3036 ◽  
Author(s):  
Zuhrina Masyithah ◽  
Dinar Rajagukguk ◽  
Samuel Oktavianus Purba ◽  
Armansyah Ginting
Keyword(s):  
Response Surface Methodology ◽  
Fatty Acid ◽  
Methyl Ester ◽  
Response Surface ◽  
Catalyst Concentration ◽  
Acid Methyl Ester ◽  
Coconut Oil ◽  
Amyl Alcohol ◽  
Effective Parameters ◽  
Acid Methyl

Coco ethanolamide obtained from the amidation of Fatty acid methyl ester (FAME) from coconut oil with monoethanolamine using zirconium (IV) chloride and tert-amyl alcohol was observed in this study. Several effective parameters were evaluated in term of catalyst concentration (5-9% w/wFAME), reaction temperature (80-100oC) and stirring speed (200-400 rpm). Response Surface Methodology (RSM) was used to optimize and to observe the interaction effects of the three variables on the FAME conversion. The capability of the process was measured from the number of FAME converted to coco ethanolamide. In the range of parameters evaluated, the conversion increase by increasing the catalyst concentration up to 9% (w/wFAME), but decreases after the optimum value. At the optimal condition, the model predicts a maximum FAME conversion of 86.27%, mainly due to a strong interaction between catalyst concentration and stirring speed.

The use of response surface methodology for improving fatty acid methyl ester profile of Scenedesmus vacuolatus

2019 ◽  
Vol 27 (22) ◽  
pp. 27457-27469 ◽  
Author(s):  
Atreyee Ghosh ◽  
Kanchan Samadhiya ◽  
Mrinal Kashyap ◽  
Vishal Anand ◽  
Pritam Sangwan ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Fatty Acid ◽  
Methyl Ester ◽  
Fatty Acid Methyl Ester ◽  
Response Surface ◽  
Acid Methyl Ester ◽  
Scenedesmus Vacuolatus ◽  
Acid Methyl

scholarly journals Evaluation of 3-Methylbutanoic Acid Methyl Ester as a Factor Influencing Flavor Cleanness in Arabica Specialty Coffee

2021 ◽  
Vol 11 (12) ◽  
pp. 5413
Author(s):  
Keiko Iwasa ◽  
Harumichi Seta ◽  
Yoshihide Matsuo ◽  
Koichi Nakahara
Keyword(s):  
Methyl Ester ◽  
Methyl Esters ◽  
Acid Methyl Ester ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Arabica Coffee ◽  
Acid Methyl ◽  
Coffee Brew ◽  
Coffee Beans ◽  
Specialty Coffee

This paper reports on the chemical compounds in arabica coffee beans with a high Specialty Coffee Association (SCA) cupping score, especially those in specialty coffee beans. We investigated the relationship between the chemical compounds and cupping scores by considering 16 types of Coffea arabica (arabica coffee) beans from Guatemala (SCA cupping score of 76.5–89.0 points). Non-targeted gas chromatography-mass spectrometry-based chemometric profiling indicated that specialty beans with a high cupping score contained considerable amounts of methyl-esterified compounds (MECs), including 3-methylbutanoic acid methyl ester (3-MBM), and other fatty acid methyl esters. The effect of MECs on flavor quality was verified by spiking the coffee brew with 3-MBM, which was the top-ranked component, as obtained through a regression model associated with cupping scores. Notably, 3-MBM was responsible for the fresh-fruity aroma and cleanness of the coffee brew. Although cleanness is a significant factor for specialty beans, the identification of compounds that contribute to cleanness has not been reported in previous research. The chemometric profiling approach coupled with spiking test validation will improve the identification and characterization of 3-MBM commonly found in arabica specialty beans. Therefore, 3-MBM, either alone or together with MECs, can be used as a marker in coffee production.

scholarly journals Response Surface Methodology to Optimize the Isolation of Dominant Volatile Compounds from Monofloral Greek Thyme Honey Using SPME-GC-MS

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3612
Author(s):  
Marinos Xagoraris ◽  
Alexandra Skouria ◽  
Panagiota-Kyriaki Revelou ◽  
Eleftherios Alissandrakis ◽  
Petros A. Tarantilis ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Volatile Compounds ◽  
Response Surface ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Fraction ◽  
Equilibration Time ◽  
Stirrer Speed ◽  
Magnetic Stirrer ◽  
Thyme Honey

This study aimed at an experimental design of response surface methodology (RSM) in the optimization of the dominant volatile fraction of Greek thyme honey using solid-phase microextraction (SPME) and analyzed by gas chromatography-mass spectrometry (GC-MS). For this purpose, a multiple response optimization was employed using desirability functions, which demand a search for optimal conditions for a set of responses simultaneously. A test set of eighty thyme honey samples were analyzed under the optimum conditions for validation of the proposed model. The optimized combination of isolation conditions was the temperature (60 °C), equilibration time (15 min), extraction time (30 min), magnetic stirrer speed (700 rpm), sample volume (6 mL), water: honey ratio (1:3 v/w) with total desirability over 0.50. It was found that the magnetic stirrer speed, which has not been evaluated before, had a positive effect, especially in combination with other factors. The above-developed methodology proved to be effective in the optimization of isolation of specific volatile compounds from a difficult matrix, like honey. This study could be a good basis for the development of novel RSM for other monofloral honey samples.

scholarly journals GC-MS ANALYSIS OF INVASIVE AQUATIC WEED, PISTIA STRATIOTES L. AND EICHHORNIA CRASSIPES (MART.) SOLMS

2017 ◽  
Vol 9 (3) ◽  
pp. 111 ◽  
Author(s):  
Tulika Tyagi ◽  
Mala Agarwal
Keyword(s):  
Methyl Ester ◽  
Ethyl Ester ◽  
Eichhornia Crassipes ◽  
Acid Methyl Ester ◽  
Acid Ethyl Ester ◽  
Pistia Stratiotes ◽  
Aquatic Weed ◽  
Hexadecenoic Acid ◽  
Hexadecanoic Acid ◽  
Acid Methyl

Objective: To investigate the bioactive components of an invasive aquatic weed, Pistia stratiotes L. and Eichhornia crassipes (Mart.) Solms vegetative parts by using Gas Chromatography-Mass Spectrometer (GC-MS).Methods: The chemical compositions of the ethanol extract of whole plant Pistia stratiotes L. and Eichhornia crassipes (Mart.) Solms was investigated using Agilent Technologies GC-MS (GC-7890A, MS 5975C).Results: The results of GC-MS analysis of the ethanolic extract revealed the existence of 28 phytochemical compounds in Pistia stratiotes L. n-Hexadecanoic acid,-11-Hexadecenoic acid, ethyl ester, Hexadecanoic acid, ethyl ester, Octadecanoic acid, ethyl ester, 2-Cyclopenten-1-one, 5-hydroxy-2,3-dimethyl, L-Glutamine, 2-Pentadecanone, 6,10,14-trimethyl, Linolelaidic acid, methyl ester, 9,12,15-Octadecatrienoic acid, methyl ester,(Z,Z,Z), Nonadecane, 12,15-Octadecadiynoic acid, methyl ester, Hexadecanoic acid, 2-hydroxy-1-(hydroxymethyl)ethyl ester, Diisooctyl phthalate, Docosanoic acid, ethyl ester, Stigmasterol, Bis(2-ethylhexyl) phthalate, 1-Monolinoleoylglycerol trimethylsilyl ether, Ethyl iso-allocholate are the major compound.The ethanolic extract of Eichhornia crassipes (Mart.) Solms contains 43 phytochemical compounds of high and low molecular weight n-Hexadecanoic acid, E-11-Hexadecenoic acid, ethyl ester, Palmitic acid, Phytol, 9,12,15-Octadecatrienal, 9,12-Octadecadienoic acid, ethyl ester, Linolenic acid, ethyl ester, Stearic acid, ethyl ester, Hexadecanoic acid, 2-hydroxy-1-(hydroxymethyl)ethyl ester, α-Glyceryl linolenate, 1-Monolinoleoylglycerol trimethylsilyl ether, Linoleic acid, 2,3-bis-(O-TMS)-propyl ester, Stigmasterol, Linolelaidic acid, methyl ester, 9,12,15-Octadecatrienoic acid, ethyl ester, (Z,Z,Z), Ethyl iso-allocholate, Cholesta-22,24-dien-5-ol, 4,4-dimethyl are the major compounds.These results indicates Pistia stratiotes L. and Eichhornia crassipes (Mart.) Solms possess potent antioxidant, anti-inflammatory, anticancer, antitumour, antiarthritic, cancer preventive, antibacterial effects so can be recommended as a plant of phytopharmaceutical importance.Conclusion: The ethanol extract of Pistia stratiotes L. and Eichhornia crassipes (Mart.) Solms proves as a potential source of bioactive compounds of pharmacological importance.

scholarly journals Homogenate Extraction of Crocins from Saffron Optimized by Response Surface Methodology

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Yingpeng Tong ◽  
Yu Jiang ◽  
Dan Guo ◽  
Yongqiu Yan ◽  
Shiping Jiang ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Ethanol Concentration ◽  
Extraction Yield ◽  
Extraction Time ◽  
Process Conditions ◽  
Extraction Temperature ◽  
Single Factor ◽  
Extraction Voltage ◽  
Homogenate Extraction

Saffron, which has many kinds of biological activities, has been widely used in medicine, cosmetics, food, and other fields of health promotion industries. Crocins are the main component of saffron (Crocus sativus L.). At present, most of the extraction methods for crocins require long time or special instruments to complete the process and some of them are not suitable for industrial production at present. In this article, homogenate extraction technology which is a convenient and efficient method was developed for crocins extraction from saffron. Firstly, the influences of extraction voltage, extraction time, ethanol concentration, and temperature on crocins yield were studied by single factor experiments; and then response surface methodology (RSM) was used to optimize levels of four variables based on the result of single factor experiments. Results showed that the optimum extraction process conditions for crocins were as follows: extraction voltage, 110 V; ethanol concentration, 70%; extraction temperature, 57°C; and extraction time, 40 s. Based on these conditions, the extraction yield of crocins can reach 22.76% which is higher than ultrasonic extraction method. Therefore, homogenate extraction is an effective way to extract crocins from saffron with higher extraction yield and shorter extraction time.

Optimization of the Ultrasonic Extraction of Gypenoside III from Gynostemma pentaphyllum by Response Surface Methodology

2012 ◽  
Vol 550-553 ◽  
pp. 1866-1870
Author(s):  
Xiao Dan Tang ◽  
Hai Yang Hang ◽  
Shao Yan Wang ◽  
Jing Xiang Cong
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Extraction Yield ◽  
Raw Material ◽  
Extraction Temperature ◽  
Optimal Conditions ◽  
Gynostemma Pentaphyllum ◽  
Bioactive Component ◽  
Yield Value ◽  
Ultrasonic Time

Gypenosides III is a major bioactive component which is rich in Gynostemma pentaphyllum. For better utilization of the native resource, response surface methodology was used to optimize the extraction conditions of gypenosides III from G. pentaphyllum. The effects of three independent variables on the extraction yield of gypenosides III were investigated and the optimal conditions were evaluated by means of Box-Behnken design. The optimal conditions are as follows: ratio of ethanol to raw material 25, extraction temperature 58°C and ultrasonic time 25min. Under these conditions, the yield of gypenoside III is 1.216±0.05%, which is agreed closely with the predicted yield value.

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