scholarly journals Preliminary Testing of Ultrasound/Microwave-Assisted Extraction (U/M-AE) for the Isolation of Geraniin from Nephelium lappaceum L. (Mexican Variety) Peel

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 572
Author(s):  
Cristian Hernández-Hernández ◽  
Cristóbal Noé Aguilar ◽  
Adriana Carolina Flores-Gallegos ◽  
Leonardo Sepúlveda ◽  
Raúl Rodríguez-Herrera ◽  
...  
Keyword(s):  
Ellagic Acid ◽  
High Performance ◽  
Bioactive Molecules ◽  
Preparative Hplc ◽  
Ionization Mass ◽  
Microwave Assisted Extraction ◽  
Polyphenol Content ◽  
Main Compound ◽  
Microwave Assisted ◽  
Assisted Extraction

The rambutan peel (RP) is a relevant source of bioactive molecules, which could be used for application in cosmetics, food, and pharmaceutical areas. Total soluble polyphenol content was extracted from Mexican variety rambutan peels using an emergent ultrasound/microwave-assisted extraction (U/M-AE) technology. Five extractions were performed using different mass/volume and ethanol/water ratios; 1:16-0; 1:16-70; 1:8-0; 1:8-70; 1:12-30. Condition 1:16-0 was defined as the best extraction condition with 0% ethanol percentage (only water). The content of total soluble polyphenols was 307.57 mg/g. The total bound polyphenol content was 26.53 mg/g. Besides, two separation processes were made with the soluble fraction; the first one was performed using Amberlite XAD-16 (Sigma-Aldrich, Saint Louis, MO, USA), and seven polyphenolic compounds were obtained. The second one was performed using a preparative HPLC (Varian, Palo Alto, CA, USA) equipment obtained fraction where three compounds were obtained: geraniin (main compound), ellagic acid, and ellagic acid pentoside. The major compound isolated in the two separations was geraniin, according to HPLC/ESI/MS (High Performance Liquid Chromatography/ElectroSpray Ionization/Mass) analysis.

scholarly journals Identification and Quantification of β-Sitosterol β-d-Glucoside of an Ethanolic Extract Obtained by Microwave-Assisted Extraction from Agave angustifolia Haw

Molecules ◽  
2019 ◽  
Vol 24 (21) ◽  
pp. 3926
Author(s):  
Herminia López-Salazar ◽  
Brenda Hildeliza Camacho-Díaz ◽  
Sandra Victoria Ávila-Reyes ◽  
Ma Dolores Pérez-García ◽  
Manases González- Cortazar ◽  
...  
Keyword(s):  
High Performance ◽  
Ethanolic Extract ◽  
Dry Weight ◽  
Extraction Time ◽  
Ionization Mass ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Agave Angustifolia ◽  
Assisted Extraction ◽  
Ft Ir

β-sitosterol β-d-glucoside (BSSG) was extracted from “piña” of the Agave angustifolia Haw plant by microwave-assisted extraction (MAE) with a KOH solution such as a catalyst and a conventional maceration method to determine the best technique in terms of yield, extraction time, and recovery. The quantification and characterization of BSSG were done by high-performance thin layer chromatography (HPTLC), Fourier-transform infrared spectroscopy (FT-IR), and high-performance liquid chromatography−electrospray ionization−mass spectrometry (HPLC-ESI-MS). With an extraction time of 5 s by MAE, a higher amount of BSSG (124.76 mg of β-sitosterol β-d-glucoside/g dry weight of the extract) than those for MAE extraction times of 10 and 15 s (106.19 and 103.97 mg/g dry weight respectively) was shown. The quantification of BSSG in the extract obtained by 48 h of conventional maceration was about 4–5 times less (26.67 mg/g dry weight of the extract) than the yields reached by the MAE treatments. MAE achieved the highest amount of BSSG, in the shortest extraction time while preserving the integrity of the compound’s structure.

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