Preparation and determination of phenolic compounds from Pyrola incarnata Fisch. with a green polyols based-deep eutectic solvent

Yao, Xiaohui; Zhang, Dongyang; Duan, Minghui; Cui, Qi; Xu, Wenjing; Luo, Meng; Li, Chunying; Zu, Yuangang; Fu, Yujie

doi:10.1016/j.seppur.2015.03.037

Cited by 88 publications

(39 citation statements)

References 36 publications

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“…Regarding R L/S , the optimum level of 45 mL g −1 found was higher than those used in other cases of polyphenol extraction with various LTTMs, which ranged between 10 and 20 mL g −1 [17][18][19]. Yet, R L/S of 36.2 mL g −1 has also been reported [15].…”

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confidence: 84%

“…Likewise, in the limited number of available studies dealing with polyphenol extraction with LTTMs, the effect of T, which plays central role in an extraction process, appears to be stronger at relatively moderate levels, varying from 60 to 80 • C [17][18][19], whereas higher T have not been tested. The optimal value determined in this study was 73 • C, which fell within such a range.…”

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confidence: 99%

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Ultrasound-Assisted Extraction of Polyphenolic Antioxidants from Olive (Olea europaea) Leaves Using a Novel Glycerol/Sodium-Potassium Tartrate Low-Transition Temperature Mixture (LTTM)

et al. 2017

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Abstract:Olive leaves (OLL) represent a major waste generated during the production of olive oil, but there is a great potential for their valorization, because they provide important content in polyphenolic phytochemicals, which possess several bioactivities. In spite of the high number of studies dealing with polyphenol recovery from olive leaves, green processes involving environmentally benign solvents are scarce. In this study, a novel renewable natural low-transition temperature mixture (LTTM), composed of glycerol and sodium-potassium tartrate, was tested for its efficient ability to extract polyphenolic substances from OLL. The extraction process was optimised by using response surface methodology and the maximum yield in total polyphenols was 26.75 ± 3.22 mg caffeic acid equivalents per g dry weight, achieved with 50% (v/v) aqueous LTTM, liquid-to-solid ratio of 45 mL g −1 and at 73 • C. The LTTM was proven to be equally effective with 60% aqueous methanol, but it displayed inferior antioxidant properties. Liquid chromatography-diode array-mass spectrometry analyses revealed no significant qualitative differences between the LTTM and the aqueous methanolic extract.

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confidence: 84%

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confidence: 99%

Ultrasound-Assisted Extraction of Polyphenolic Antioxidants from Olive (Olea europaea) Leaves Using a Novel Glycerol/Sodium-Potassium Tartrate Low-Transition Temperature Mixture (LTTM)

et al. 2017

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“…Therefore, in selecting the proper DES for extraction, polarity similarity is a top priority as far as efficiency is concerned. This might be difficult given the many potential structures of DES, but potentially enables great efficiency through novel structures that approach the polarity of each given target [21,22].…”

Section: Molecular Structure and Composition Of The Desmentioning

confidence: 99%

Deep Eutectic Solvents as Extraction Media for Valuable Flavonoids from Natural Sources

2019

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The present review article attempts to summarize the use of deep eutectic solvents in the extraction of flavonoids, one of the most important classes of plant secondary metabolites. All of the applications reviewed have reported success in isolation and extraction of the target compounds; competitive, if not superior, extraction rates compared with conventional solvents; and satisfactory behavior of the extract in the latter applications (such as direct analysis, synthesis, or catalysis), wherever attempted.

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“…The reasons for this result were probably related to the decrease of choline chloride. Decrease in the ratio of choline chloride would reduce the interactions between target compounds and chloride anion and increase the acidity of DES . Therefore, DES‐1 was proved to be the best DES combination and was selected for further experiments.…”

Section: Resultsmentioning

confidence: 99%

Efficient extraction and determination of prenylflavonol glycosides in Epimedium pubescens Maxim. using deep eutectic solvents

Wang

Peng

Zhao

et al. 2019

Phytochemical Analysis

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Introduction The Epimedium herb, Yinyanghuo in Chinese, is a famous Chinese herbal medicine. In this study, an efficient extraction method was developed for the extraction of major bioactive constituent epimedin A, epimedin B, epimedin C and icariin from E. pubescens Maxim. using deep eutectic solvents (DESs). Methodology A series of choline chloride‐based DESs were synthesised for the extraction of four target compounds. DES composed of lactic acid and choline chloride with the ratio of 2:1 was selected as the most promising. Three vital factors affecting the extraction yields including water content, volume of DES aqueous solution and extraction time were optimised systematically by Box–Behnken experimental design in combination with response surface methodology. A high‐performance liquid chromatography ultraviolet (HPLC‐UV) method was developed for the sensitive and accurate quantification. Results The optimal extraction conditions were obtained as follows: water content of 17.5% (v/v), volume of DES aqueous solution 3.14 ml, and extraction time of 21 min. Under the optimal extraction conditions, the developed DES method could supply almost the same extraction yield as 50% ethanol, which were 98%, 99%, 97%, 96% for epimedin A, epimedin B, epimedin C and icariin, respectively. Conclusion The present study exhibited high efficiency in extraction of prenylflavonol glycosides in E. pubescens Maxim. Thus, DESs could be used as an alternative for efficient extraction and quantification of biologically active components from natural medical plants.

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Preparation and determination of phenolic compounds from Pyrola incarnata Fisch. with a green polyols based-deep eutectic solvent

Cited by 88 publications

References 36 publications

Ultrasound-Assisted Extraction of Polyphenolic Antioxidants from Olive (Olea europaea) Leaves Using a Novel Glycerol/Sodium-Potassium Tartrate Low-Transition Temperature Mixture (LTTM)

Ultrasound-Assisted Extraction of Polyphenolic Antioxidants from Olive (Olea europaea) Leaves Using a Novel Glycerol/Sodium-Potassium Tartrate Low-Transition Temperature Mixture (LTTM)

Deep Eutectic Solvents as Extraction Media for Valuable Flavonoids from Natural Sources

Efficient extraction and determination of prenylflavonol glycosides in Epimedium pubescens Maxim. using deep eutectic solvents

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