Ultrasound assisted extraction for the recovery of phenolic compounds from waste hazelnut shell

Dal, Orkan; Şengün, Duygu; Özşen, Aslı Yüksel

doi:10.35208/ert.763459

Cited by 2 publications

(1 citation statement)

References 29 publications

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“…Phenolic ingredients can be extracted by several methods including the use of cold solvents [14], filtration [15], microwave [16], microfluidic system [17], pressurized fluid [18], Soxhlet [19,20], supercritical fluids [21], and ultrasound [22,23]. Soxhlet extraction is well known and preferred as an extraction method that offers much higher efficiency than other methods in obtaining the desired target compounds (antioxidant and phenolic compounds) [24]. In addition, it has some advantages over other methods, such as ease of operation, less costly, constant operating conditions (e.g., temperature), no need for additional filtration and product purification, and constant contact of solvent and sample [25,26].…”

Section: Introductionmentioning

confidence: 99%

A comparative assessment for efficient oleuropein extraction from olive leaf (Olea europaea L. folium)

RECEPOĞLU

GÜMÜŞBULUT

Özşen

2023

Turkish Journal of Engineering

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Extraction Phenolic compound Oleuropein Olive leaf SoxhletSince oleuropein has long been known in the health sector and is abundant directly in our country as the fourth largest olive producer, oleuropein, the predominant phenolic ingredient in olive leaves, was recovered in this study using Soxhlet extraction. The effects of different solvent types (acetonitrile, ethanol, methanol, and water), extraction period (4 cycles, 4 h, and 8 h), particle size (250-500 µm and 900-2000 µm), and pretreatment of olive leaves on the yield of oleuropein were examined to determine the maximum yield. A greater oleuropein yield was obtained when the particle size of olive leaves utilized for extraction was lowered. Furthermore, aqueous solvents revealed a higher yield of oleuropein than pure solvents and prolonging the extraction duration resulted in a significant increase in the amount of oleuropein extracted. On the other hand, pretreatment of olive leaves resulted in a reduction in oleuropein output. As a result, with 36% extraction efficiency in terms of olive leaf conversion, the highest oleuropein extraction yield was obtained as 13.35 mg g -1 dry leaf for 8 h of extraction time using olive leaves with a particle size of 250-500 µm and an 80% methanol solution as solvent.

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Section: Introductionmentioning

confidence: 99%

A comparative assessment for efficient oleuropein extraction from olive leaf (Olea europaea L. folium)

RECEPOĞLU

GÜMÜŞBULUT

Özşen

2023

Turkish Journal of Engineering

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Intensification of the extraction process of phenolic compounds from Acorus calamus leaves

Andryushayev

Рубан

Maslii

et al. 2021

SR: PS

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The aim. To determine the intensified method of extraction of phenolic compounds from Acorus calamus leaves and optimal conditions for the process. Materials and methods. In order to develop the optimal intensified method of extraction samples were prepared in different conditions of raw materials-extractant ratio, temperature, time and multiplicity. As a raw materials spectrophotometrically pre-standardized Acorus calamus leaves were used. The extraction was carried out in a hermetically sealed ultrasonic extraction reactor PEX 1 (REUS, Contes, France). As the criteria of extraction efficiency were indicators of dry residue and total amount of flavonoids determined using methods described in State Pharmacopoeia of Ukraine. The amount of flavonoids was determined spectrophotometrically on a certified device Specord 200 (Analytik Jena, Germany). Results. According to our research results it was found that ultrasonic action and addition of surfactant significantly improves the efficiency of the extraction process. The optimal conditions for the process were determined. Experimentally proved that the rational raw material-extractant ratio is 1:15. Comparative study of the extraction process with different temperatures showed that the highest amount of extractives is achieved at temperature 70 °C and 45 min of duration. The optimal extraction multiplicity is 3. Conclusions. As a result of the study, the intensified extraction method for Acorus calamus leaves – re-maceration with ultrasound – was established. The conducted researches allowed to develop the method of extraction, expedient in the conditions of the modern pharmaceutical industry.

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Ultrasound assisted extraction for the recovery of phenolic compounds from waste hazelnut shell

Cited by 2 publications

References 29 publications

A comparative assessment for efficient oleuropein extraction from olive leaf (Olea europaea L. folium)

A comparative assessment for efficient oleuropein extraction from olive leaf (Olea europaea L. folium)

Intensification of the extraction process of phenolic compounds from Acorus calamus leaves

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