Optimisation of an ultrasound-assisted extraction method for the simultaneous determination of phenolics in rice grains

Setyaningsih, Wiwik; Saputro, Irfan E.; Carrera, Ceferino; Palma, Miguel

doi:10.1016/j.foodchem.2019.02.107

Cited by 70 publications

(32 citation statements)

References 32 publications

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“…The effect of this parameter was attributed to the possibility that the reduced mixture density attained as a result of the higher solvent-to-material ratio increased the ultrasound wave propagation speed while reducing the effect of attenuation of ultrasounds and increasing the transfer of energy/distance covered by wave/time [27,28]. Our findings were in agreement with those reported by Setyaningsih et al [29] for the extraction of polyphenols from rice grains, De Oliveira et al [30] for the extraction of hibalactone in Hydrocotyle umbellata subterraneous parts and Pavlic et al [31] for the extraction of polyphenols from peppermint.…”

Section: Influence Of Solid/liquid Ratiosupporting

confidence: 93%

Ultrasound-Assisted Extraction of Polyphenols from Crude Pollen

2020

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The aim of this study was to evaluate the extraction efficiency of polyphenols from crude pollen by an ultrasonic process. Prior to the polyphenols extraction, the crude pollen was defatted. The extraction from defatted pollen was carried out by varying four extraction parameters: ultrasonic amplitude (20%, 60% and 100%), solid/liquid ratio (10 g/L, 20 g/L and 30 g/L), temperature (35, 50 and 65 °C) and time (10, 20 and 30 min). The extracts were analyzed in terms of extraction yield (%), total phenolic content (TPC) and total flavones content (TFC). The extracted oil was analyzed in terms of fatty acids composition; myristic acid (159.1 µg × g−1) and cis-14-pentadecenoic acid (106.6 µg·g−1) were found in the highest amount in the pollen oil. The optimum conditions of extraction were determined and were, as follows: 100% amplitude of ultrasonic treatment, 30 g/L solid/liquid ratio, 40.85 °C and 14.30 min, which led to the extraction of 366.1 mg GAE/L of TPC and 592.2 mg QE/g of TFC, and also to an extraction yield of 1.92%.

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Section: Influence Of Solid/liquid Ratiosupporting

confidence: 93%

Ultrasound-Assisted Extraction of Polyphenols from Crude Pollen

2020

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“…Application of innovative technologies and optimization of Vladic et al: Subcritical Water for Recovery of Polyphenols ... production processes to produce natural products has been in the focus of numerous scientific studies. [10][11][12][13][14] Ultrasound-assisted extraction has been demonstrated as an advisable tool to recover polyphenols from plant materials, due to its cheapness and maintenance cost. 15 Report by Wang et al indicates that UAE reduces processing time, accelerates heat and mass transfer and requires a simple and easy to operate apparatus which helps in easy extraction of thermolabile compounds, without any degradation.…”

Section: Introductionmentioning

confidence: 99%

Subcritical Water for Recovery of Polyphenols from Comfrey Root and Biological Activities of Extracts

Vladić¹,

Nastić²,

Stanojkoivć³

et al. 2019

ACSi

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In the present study, subcritical water was used for extraction of bioactive compounds of Symphytum officinale root. Temperature (120-200 °C), extraction time (10-30 min) and HCl concentration in extraction solvent (0-1.5%) were investigated as independent variables in order to obtain the optimal conditions for extraction and to maximize the yield of total phenols, flavonoids and antioxidant activity of obtained extracts. The application of optimal conditions (200 °C, 25.6 min and 0.0075%) provided extracts rich in total phenols and flavonoids and high antioxidant activity. Results also demonstrated that subcritical water extraction showed significant advantages for recovery of comfrey root bioactive compounds comparing to maceration and ultrasound-assisted extraction techniques. In addition, subcritical water extracts of S. officinale root are the promising sources of compounds with antioxidant, ACE inhibition, and antiproliferative properties and could potentially be used for production of new pharmacologically-active formulations.

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“…(2019) observed a positive effect of ultrasound‐assisted extraction time, with an increase of ~ 13% in the interval of 15–60 min. As described by Setyaningsih, Saputro, Carrera, and Palma (2019), the effects of ultrasound cavitation enhanced the permeability of the matrix tissues with the increase of processing duration, leading to more release of analytes into the solvent from the different portions of matrix.…”

Section: Resultsmentioning

confidence: 84%

Ultrasound‐assisted extraction of phenolic compounds and soluble sugars from the stem portion of peach palm

Donadone

Giombelli²,

Silva³

et al. 2020

J Food Process Preserv

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The aim of this work was to investigate the ultrasound‐assisted extraction (UAE) of total phenolic compounds (TPC) and soluble sugars (SS) from the by‐product of peach palm (stem portion). The effect of the processing variables temperature (30–60°C), time (15–45 min), and power density (8.47–25.42 mW cm−3) were evaluated. The maximum contents (dry basis) of TPC (345.81 ± 2.82 mg gallic acid equivalent 100 g−1) and SS (16.68 ± 0.24 g 100 g−1) were obtained, respectively, at 60°C, 30 min and 8.47 mW cm−3 (condition 1) and 60°C, 45 min and 25.42 mW cm−3; in these conditions, the extracts had higher sucrose content than glucose and fructose. The highest content of phenolic acids (gallic, coumaric, vanillic, ferulic, trans‐cinnamic) and highest antioxidant activity were obtained in the condition 1. UAE can be considered an effective method for the extraction of TPC and SS from peach palm stem. Practical applications The ultrasound‐assisted extraction (UAE) was applied in the by‐product of heart‐of‐palm (stem portion) to the removal of phenolic compounds and soluble sugars. To realize this process with time and energy economy, the maximized condition of extraction observed at 60°C, 30 min, and 8.47 mW cm−3 was the most interesting. This extract showed the highest content of phenolic compounds and highest antioxidant potential, which can allow its application to preserve the shelf life of food products or to produce food supplements. The soluble sugars extracted can also be used, as example, in fermentative process. Therefore, the results indicate the viability of UAE to offer alternatives to utilization of stem portion of peach palm.

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Optimisation of an ultrasound-assisted extraction method for the simultaneous determination of phenolics in rice grains

Cited by 70 publications

References 32 publications

Ultrasound-Assisted Extraction of Polyphenols from Crude Pollen

Ultrasound-Assisted Extraction of Polyphenols from Crude Pollen

Subcritical Water for Recovery of Polyphenols from Comfrey Root and Biological Activities of Extracts

Ultrasound‐assisted extraction of phenolic compounds and soluble sugars from the stem portion of peach palm

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