Extract‐rich in flavonoids from Hibiscus sabdariffa calyces: Optimizing microwave‐assisted extraction method and characterization through LC‐Q‐TOF‐MS analysis

2019 ◽  
Vol 43 (2) ◽  
Author(s):  
Oluwaseun R. Alara ◽  
Nour H. Abdurahman ◽  
Emmanuel O. Obanijesu ◽  
John A. Alara ◽  
Siti K. Abdul Mudalip
Keyword(s):  
Extraction Method ◽  
Hibiscus Sabdariffa ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Ms Analysis ◽  
Assisted Extraction ◽  
Tof Ms

scholarly journals Microwave-Assisted Extraction of Phenolics from Hibiscus sabdariffa Flowers: Method Development and Validation

Proceedings ◽  
2020 ◽  
Vol 70 (1) ◽  
pp. 51
Author(s):  
Rohmah Nur Fathimah ◽  
Widiastuti Setyaningsih ◽  
Ceferino Carrera ◽  
Miguel Palma
Keyword(s):  
Phenolic Compounds ◽  
Chlorogenic Acid ◽  
Caffeic Acid ◽  
Solvent Composition ◽  
Positive Contribution ◽  
Hibiscus Sabdariffa ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Development And Validation

Phenolics are bioactive compounds already reported in Hibiscus sabdariffa (roselle). The present study reports the development and validation of the analytical microwave-assisted extraction (MAE) method for the determination of phenolic compounds in roselle flowers to establish their positive contribution to human health. Prior to the optimization, a study for identifying phenolic compounds revealed that chlorogenic acid, protocatechuic acid, caffeic acid, and rutin were presented in Roselle. Three factors affecting MAE, viz. temperature, solvent composition, and sample to solvent ratio, were optimized employing a Box-Behnken Design (BBD) in conjunction with response surface methodology (RSM). The maximum extraction recovery was achieved using the extraction temperature of 68 °C, solvent composition of 59% MeOH in water, and 20:1 solvent to sample ratio. The kinetics experiment confirmed full recoveries (92–119%) at 15 min. Subsequently, method validation showed a satisfactory result, including low detection limits from 0.219 mg L−1 (caffeic acid) to 0.374 mg L−1 (chlorogenic acid). Both precisions and accuracy met the acceptances by AOAC. Finally, the method was successfully applied to quantify phenolics in the two most common varieties of Roselle. Chlorogenic acid was found as the main phenolic compound in both varieties

Development of a Microwave-Assisted Extraction Method for the Determination of Organochlorine Pesticides in Mussel Tissue

2013 ◽  
Vol 7 (6) ◽  
pp. 1271-1277 ◽  
Author(s):  
Emmanouil-Nikolaos Papadakis ◽  
Archontoula Kyrgidou ◽  
Zisis Vryzas ◽  
Euphemia Papadopoulou-Mourkidou
Keyword(s):  
Organochlorine Pesticides ◽  
Extraction Method ◽  
Microwave Assisted Extraction ◽  
Mussel Tissue ◽  
Microwave Assisted ◽  
Assisted Extraction

Optimization of the microwave-assisted extraction and antioxidant activities of anthocyanins from blackberry using a response surface methodology

RSC Advances ◽  
2015 ◽  
Vol 5 (25) ◽  
pp. 19686-19695 ◽  
Author(s):  
Yao Wen ◽  
Huaguo Chen ◽  
Xin Zhou ◽  
Qingfang Deng ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Extraction Method ◽  
Antioxidant Activities ◽  
Anthocyanin Content ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

Blackberry contains high amounts of anthocyanins, whose extraction method is closely related with anthocyanin content and antioxidant activity.

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