Microwave-assisted extraction for Hibiscus sabdariffa bioactive compounds

Pimentel-Moral, Sandra; Borrás-Linares, Isabel; Lozano-Sánchez, Jesús; Arráez-Román, David; Martínez-Férez, Antonio; Segura‐Carretero, Antonio

doi:10.1016/j.jpba.2018.04.050

Cited by 123 publications

(80 citation statements)

References 23 publications

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“…The presence of these bioactive compounds might be the reason for the diverse biological activities of H. sabdariffa calyx extract (Ojulari, Lee, & Nam, ). Previous studies had outlined that the presence of kaempferol, quercetin, luteolin, and their derivatives in the plant extract may be responsible for its antioxidant activity (Cassol et al, ; Obouayeba et al, ; Pimentel‐moral, Borrás‐linares, & Lozano‐sánchez, ). Aside from these chemical compounds, the combined effects of all the tentatively identified chemical compounds might be responsible for the diverse biological activities of H. sabdariffa calyx as previously reported (Da‐Costa‐Rocha et al, ).…”

Section: Resultsmentioning

confidence: 99%

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

Alara

Abdurahman

Obanijesu

et al. 2019

J Food Process Engineering

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Hibiscus sabdariffa comprises calyx which is rich in flavonoids and numerous phytochemical compounds. Nevertheless, the extraction parameters can influence the recoveries of these bioactive compounds. It is then important to investigate the contributing effects of the process parameters and optimized their conditions to achieve higher recovery yield. Hence, this study was carried out to examine the contributing effects of microwave-assisted extraction (MAE) process factors (irradiation time, ethanol concentration, solvent/sample ratio, temperature, and microwave power) on the yield of total flavonoid (TF) contents from H. sabdariffa calyces using one-variable-at-a-time.The significant MAE process parameters were further optimized using Box Behnken design. At the MAE optimal conditions, the extract was analyzed to identify the flavonoid compounds using liquid chromatography-mass spectrometry quadrupole time of flight. An optimum TF content of 94.32 mg QE/g extract from H. sabdariffa calyces was obtained at the following MAE conditions: Irradiation time of 4 min; ethanol concentration of 52% vol/vol; microwave power of 450 W and solvent/sample ratio 15:1 ml/g. Moreover, 95 flavonoid compounds were tentatively identified in the extract at optimized MAE conditions. Thus, these flavonoids can be further isolated in future studies to unveil embedded potentials of H. sabdariffa calyx extract. Practical applicationThe procedure described the microwave-assisted extraction (MAE) which can serve as a guideline for extracting flavonoids from Hibiscus sabdariffa calyx. Moreover, the liquid chromatography-mass spectrometry quadrupole time of flight analysis provided the developed conditions for identifying flavonoids from the calyces. The results obtained suggested the exact MAE conditions to achieve an optimum yield of flavonoids from H. sabdariffa calyces. Most importantly, the tentatively identified flavonoids can further be isolated and purified in future studies to unveil the embedded biological potentials.

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Section: Resultsmentioning

confidence: 99%

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

Alara

Abdurahman

Obanijesu

et al. 2019

J Food Process Engineering

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“…Some studies have revealed that some environmental factors such as UV radiation, blue light, high light intensity, wounding, pathogen attack, drought, and nutrients deficiency have an influence on the accumulation of anthocyanins in plants 21,22 . In addition to all these external factors, all the parameters applied during the extraction (temperature, time and percentage of solvent) also have a great influence on the amount of extracted compounds 23 . Therefore, it is of utmost importance to study different species of plants submitted to different conditions of cultivation and growth, and therefore different stress conditions, in order to understand how these differences may influence the chemical and nutritional composition.…”

Section: Nutritional and Chemical Characterizationmentioning

confidence: 99%

“…This could be due to the fact that anthocyanins are more soluble in water than ethanol, and in addition, it is interesting to note that despite the application of a higher temperature in the infusion extraction, this did not contribute to the degradation of anthocyanins relatively to hydroethanolic extraction. Moreover, a previous study which aimed to optimize the extraction of phenolic compounds from H. sabdariffa calyces by microwave-assisted extraction, proved that different factors, such as temperature, time, and solvents proportion, can cause changes in the quantitative composition of bioactive compounds 23 . Thus, these factors could highly influence the concentration of these molecules.…”

Section: Phenolic Compounds Quantificationmentioning

confidence: 99%

Exploring the chemical and bioactive properties of Hibiscus sabdariffa L. calyces from Guinea-Bissau (West Africa)

et al. 2019

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“…At the same time, the extraction time of MAE was reduced by 4.5 times, which indicated that microwave irradiation can enhance the extraction efficacy by greatly shortening the extraction time. The reason could be microwave irradiation can rapidly increase the local temperature and pressure inside the plant matrix by direct heating, which can facilitate the release of the target compounds and enhance the extraction efficiency (Pimentel‐Moral et al , ). Similar findings were reported by other studies (Ying et al , ; Bélafi‐Bakó et al , ; Sommano et al , ).…”

Section: Resultsmentioning

confidence: 99%

Green extraction of soluble dietary fibre from coffee silverskin: impact of ultrasound/microwave‐assisted extraction

Wen

Zhang

Zhao

et al. 2020

Int J of Food Sci Tech

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Coffee silverskin (CSS), a potential source of soluble dietary fibre (8%-11%), is a major coffee by-product obtained during the coffee roasting process. Ultrasound-assisted extraction (UAE) and microwave-assisted extraction (MAE) have been considered as efficient and economic novel extraction techniques. In this study, UAE, MAE and simultaneous ultrasound-microwave-assisted extraction (UMAE) techniques were investigated for soluble dietary fibre (SDF) extraction from CSS and compared with conventional solvent extraction (CSE). The highest recovery rate of SDF was accomplished by UMAE (42.7 AE 0.4%), which was 1.5-fold, 1.9-fold and 1.2-fold of the recovery rates achieved by CSE, UAE and MAE, respectively. The extraction time of UMAE was 20 min, which was the same as UAE and MAE, and 4.5-fold less than CSE. It implied that the combination of UAE and MAE could enhance the extraction process by increasing the recovery rate as well as by reducing extraction time as compared with CSE or other individual novel extraction methods applied. Nutritional composition and physicochemical characteristics of the SDF extracts from CSS were also investigated in the study.Green extraction of soluble dietary fibre L. Wen et al.

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Microwave-assisted extraction for Hibiscus sabdariffa bioactive compounds

Cited by 123 publications

References 23 publications

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

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

Exploring the chemical and bioactive properties of Hibiscus sabdariffa L. calyces from Guinea-Bissau (West Africa)

Green extraction of soluble dietary fibre from coffee silverskin: impact of ultrasound/microwave‐assisted extraction

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