scholarly journals Extraction of Carotenoids from Tomato Pomace via Water-Induced Hydrocolloidal Complexation

Biomolecules ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1019 ◽  
Author(s):  
Jayesree Nagarajan ◽  
Hang Pui Kay ◽  
Nagendra Prasad Krishnamurthy ◽  
Nagasundara Ramanan Ramakrishnan ◽  
Turki M. S. Aldawoud ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Antioxidant Capacity ◽  
Extraction Methods ◽  
Extraction Yield ◽  
Raw Material ◽  
Aqueous Environment ◽  
Tomato Pomace ◽  
Green Approach ◽  
Solvent Extraction Method ◽  
Conventional Solvent Extraction

Agro-industrial waste is a largely untapped natural resource of bioactive compounds including carotenoids and pectin. However, conventional solvent extraction involves the excessive use of organic solvents, costly equipment, and tedious operation. These limitations of conventional extraction methods could be prospectively overcome by the carotenoid–pectin hydrocolloidal complexation. The complexation of lycopene and pectin was efficiently promoted in an aqueous environment, resulting in the colloidal complexes that can be subsequently recovered by sedimentation or centrifugation. In this study, the potential of carotenoid–pectin complexation on tomato pomace containing carotenoids and pectin was evaluated. Tomato pomace is a rich source of lycopene, β-carotene as well as pectin, making it suitable as the raw material for the carotenoid extraction. The extraction of carotenoid and pectin from tomato pomace was optimized using response surface methodology. The maximum recovery was 9.43 mg carotenoid fractions/100 g tomato pomace, while the purity of carotenoid-rich fractions was 92%. The antioxidant capacity of carotenoids extracted from the complexation method was found to be higher than that from the solvent extraction method. Moreover, extraction yield and antioxidant capacity of carotenoid obtained from the carotenoid–pectin complexation were comparable to that from solvent extraction. The carotenoid–pectin complexation is a promising green approach to valorize agro by-products for the extraction of valuable carotenoids.

Comparison of Conventional and Ultrasound-Assisted Extraction Techniques for Extraction of Phenolic Compounds from Coconut Husk

2019 ◽  
Vol 891 ◽  
pp. 83-89
Author(s):  
Attapon Nitiwattananon ◽  
Saipin Thanachasai
Keyword(s):  
Solvent Extraction ◽  
Phenolic Compounds ◽  
Extraction Methods ◽  
Extraction Yield ◽  
Agitation Speed ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Conventional Solvent Extraction ◽  
Ultrasound Assisted ◽  
Conventional Extraction

In this study, ultrasound-assisted extraction (UAE) was compared with conventional extraction methods, including conventional solvent extraction without agitation (CSE), conventional solvent extraction with agitation at 50 rpm (CSE50) and 150 rpm (CSE150), for the extraction of phenolic compounds from coconut (Cocos nucifera L.) husk. The extraction yield, total phenolic content (TPC) and total flavonoid content (TFC) were examined. The antioxidant capacity of C. nucifera extracts was determined by using 2,2’-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and 2,2’-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assays. Experimental results showed that UAE gave the highest extraction yield, TPC, TFC and antioxidant capacities (ABTS and DPPH), followed by CSE150, CSE50 and CSE, respectively. UAE was found to be more effective than conventional extraction methods. Conventional solvent extraction with higher agitation speed exhibited higher extraction efficiency than those with lower agitation speed and without agitation.

scholarly journals Polyphenols From Vitis vinifera Lambrusco By-Products (Leaves From Pruning): Extraction Parameters Evaluation Through Design of Experiment

2019 ◽  
Vol 14 (7) ◽  
pp. 1934578X1986290 ◽  
Author(s):  
Massimo Tacchini ◽  
Ilaria Burlini ◽  
Immacolata Maresca ◽  
Alessandro Grandini ◽  
Tatiana Bernardi ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Antioxidant Capacity ◽  
Design Of Experiment ◽  
Extraction Yield ◽  
Wine Industry ◽  
Raw Material ◽  
Extraction Time ◽  
Total Phenolic ◽  
Vitis Vinifera L ◽  
By Products

Vitis vinifera L. leaves from pruning are by-products of the wine industry and represent an important source of secondary raw material, thanks to their polyphenols content. Optimization of the extraction processes is a key factor for their valorization, and Design of Experiment (DOE) could be a tool to obtain the most performing extract in terms of polyphenols quality/quantity and bioactivity. Vitis vinifera Lambrusco leaves were subjected to ultrasound-assisted extractions guided by a 23 factorial design. Three independent parameters (% solvent, time of extraction, and solvent:solid ratio) were considered to evaluate the extraction process by analyzing the extraction yield, the total phenolic content (Folin-Ciocalteu assay), and the antioxidant capacity (DPPH assay). Moreover, the content of the main molecules was identified and quantified by reversed-phase high-performance liquid chromatography coupled with diode array detection and mass spectrometry. The DOE highlighted the best extraction conditions that showed slight changes considering the different evaluating parameters. The highest extraction yield was obtained by extraction with 100% water, 60 minutes of extraction time, and 30:1 solvent:solid ratio, but it was neither the richest in polyphenols nor antioxidant capacity. The latter 2 characteristics were associated with the extraction performed using 50% ethanol, 35 minutes of extraction time, and a 20:1 solvent:solid ratio. That extract also exhibited the highest quantity of flavonols.

scholarly journals Extraction and Formulation of Perfume from Cymbopogon citratus (Lemongrass)

2021 ◽  
Vol 25 (8) ◽  
pp. 1461-1463
Author(s):  
O.E. Ameh ◽  
J.I. Achika ◽  
N.M. Bello ◽  
A.J. Owolaja
Keyword(s):  
Solvent Extraction ◽  
Essential Oil ◽  
Essential Oils ◽  
Boiling Point ◽  
Extraction Method ◽  
Extraction Methods ◽  
Suitable Method ◽  
Oil Yield ◽  
Cymbopogon Citratus ◽  
Solvent Extraction Method

This work aimed to extract perfume from the leaves of Cymbopogon citratus using three extraction methods viz: distillation, solvent extraction and expression or effleurage. About 150 g of dried lemons grass were extracted using ethanol as the solvent to obtain essential oils required for the formulation of perfumes. The result of the hydrodistillation process showed that 1.23 g of essential oil per 130g of dry lemongrass produce 0.95% oil at 78 °C, while the effleurage method was 2.55 g of essential oil per 130 g of dry lemongrass sample thereby producing 1.96% oil yield. The solvent extraction method gave 2.7 g of essential oil per 130 g of dry lemongrass sample. This gives about 2.08 % yield of essential oil at a temperature of 78°C i.e. the boiling point of ethanol. The solvent extraction method yielded 2.08%, the effleuragemethod yielded 1.96% and the hydrodistillation method yielded 0.95% essential oil respectively. In conclusion, solvent extraction gave the highest yield because of less exposure to air and heat, which is highly recommended as the most suitable method for the extraction of essential oil.

Note: A rapid method for the determination of lipids an fatty acids in bread by gas chromatography / Nota: Método rápido para la determinación de lípidos y ácidos grasos en pan mediante cromatografía de gases

1998 ◽  
Vol 4 (3) ◽  
pp. 207-210
Author(s):  
Y.A. Sultanovitch ◽  
O. Philipp ◽  
M. Schmelewa ◽  
H.D. Isengard
Keyword(s):  
Fatty Acids ◽  
Gas Chromatography ◽  
Solvent Extraction ◽  
Analytical Method ◽  
Extraction Method ◽  
Conversion Factor ◽  
High Sensitivity ◽  
Solvent Extraction Method ◽  
Conventional Solvent Extraction

A new simple and fast analytical method was developed to characterize the content of lipids and fatty acids in bread. First, fatty acids were determined by gas chromatography and then the content of lipids was calculated by using a conversion factor. This method gave very accurate results; it was three times faster than the conventional solvent extraction method and its consumption of solvent was much lower. The high sensitivity allowed the distribution of lipids in bread to be determined.

Characterization of Groundwater Contaminants at Elmira, Ontario, by Thermal Desorption, Solvent Extraction GC-MS and HPLC

1990 ◽  
Vol 25 (3) ◽  
pp. 275-292 ◽  
Author(s):  
S. Lesage ◽  
J.K. Ritch ◽  
E.J. Treciokas
Keyword(s):  
Solvent Extraction ◽  
Thermal Desorption ◽  
Array Detector ◽  
Groundwater Contaminants ◽  
Ms Analysis ◽  
Solvent Extraction Method ◽  
Groundwater Samples ◽  
On Line ◽  
Conventional Solvent Extraction

Abstract Contaminated groundwater samples were characterized using on-line thermal desorption GC-MS analysis. The results were compared with conventional solvent extraction method followed by GC-MS analysis. Thermal desorption gave similar results for most compounds and was found to be superior for the analysis of water-miscible compounds. HPLC with a diode-array detector was used to measure phenol in the presence of large quantities of aniline.

Influence of Different Extraction Methods of Tea Polyphenols on Proportions of Catechins

2011 ◽  
Vol 311-313 ◽  
pp. 2114-2120 ◽  
Author(s):  
Rong Hui Lai ◽  
Xing Fei Lai ◽  
Wen Xia Zhao ◽  
Ya Hui Huang
Keyword(s):  
Solvent Extraction ◽  
Organic Solvent ◽  
Extraction Method ◽  
Total Content ◽  
Extraction Methods ◽  
Tea Polyphenols ◽  
Precipitation Method ◽  
Effect Of Solvent ◽  
Organic Solvent Extraction ◽  
Solvent Extraction Method

The catechins composition of tea polyphenols with different extracted methods was analysed by HPLC. The aim is to compare the extraction effect of water-extracting and alcohol-extracting method, the purification effect of solvent extraction and ionic precipitation method. The results indicated that organic solvent extraction method can improve the extraction rate of catechins, especially can increase the content of estered catechins. In the technic of organic solvent extraction, the total content of catechins can effectively be increased by using alcohol extraction. Ion precipitation can enhance the content of gallocatechins，while organic solvent extraction can raise the contents of catechins，EC and estered catechins.

scholarly journals Accelerated Solvent Extraction as a Green Tool for the Recovery of Polyphenols and Pigments from Wild Nettle Leaves

Processes ◽  
2020 ◽  
Vol 8 (7) ◽  
pp. 803
Author(s):  
Maja Repajić ◽  
Ena Cegledi ◽  
Valentina Kruk ◽  
Sandra Pedisić ◽  
Fırat Çınar ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Antioxidant Capacity ◽  
Accelerated Solvent Extraction ◽  
Ultrasound Assisted Extraction ◽  
Extraction Solvent ◽  
Green Approach ◽  
Assisted Extraction ◽  
Chlorophylls A And B ◽  
Different Temperatures ◽  
Ultrasound Assisted

This study aimed to investigate the performance of accelerated solvent extraction (ASE) as a green approach for the recovery of polyphenols and pigments from wild nettle leaves (NL). ASE was operated at different temperatures (20, 50, 80 and 110 °C), static times (5 and 10 min) and cycle numbers (1–4) using ethanol (96%) as an extraction solvent. In order to compare the efficiency of ASE, ultrasound assisted extraction (UAE) at 80 °C for 30 min was performed as a referent. Polyphenol and pigment analyses were carried out by HPLC and antioxidant capacity was assessed by ORAC. Seven polyphenols from subclasses of hydroxycinnamic acids and flavonoids, along with chlorophylls a and b and their derivatives and six carotenoids and their derivatives were identified and quantified. Chlorogenic acid was the most abundant polyphenol and chlorophyll a represented the dominant pigment. ASE conditions at 110 °C/10 min/3 or 4 cycles proved to be the optimal for achieving the highest yields of analyzed compounds. In comparison with UAE, ASE showed better performance in terms of yields and antioxidants recovery, hence delivering extract with 60% higher antioxidant capacity. Finally, the potential of NL as a functional ingredient from natural sources can be successfully accessed by ASE.

scholarly journals Continuous Monitoring of Resin Content in Prepreg Unidirectional Tapes by Beta-Ray Method

2002 ◽  
Vol 11 (1) ◽  
pp. 096369350201100 ◽  
Author(s):  
Y.D. Huang ◽  
L. Liu ◽  
Y.F. Sun ◽  
J.H. Qiu ◽  
N. Nakayama ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Extraction Method ◽  
Continuous Monitoring ◽  
Resin Content ◽  
Ray Method ◽  
Impregnation Process ◽  
Monitoring Technique ◽  
Solvent Extraction Method ◽  
Conventional Solvent Extraction ◽  
Calibration Relations

A beta-ray monitoring technique has been developed to measure the resin content during the manufacture of prepreg unidirectional tapes by solution impregnation process. A series of calibration relations have been obtained for aramid, carbon and glass fibres reinforced epoxy prepreg tapes, and good agreements with resin content have been shown by the beta-ray system and conventional solvent extraction method. Moreover, the effect of the variation of the fibre areal weight on measuring accuracy has been analysed.

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