Screening the effect of different extraction methods (ultrasound-assisted extraction and solid–liquid extraction) on the recovery of glycoalkaloids from potato peels: Optimisation of the extraction conditions using chemometric tools

The first step in the qualitative and quantitative analysis of medicinal plant constituents is the extraction step. Ideally, an extraction procedure should be exhaustive with respect to the constituents to be analyzed, rapid, simple, and for routine analysis amenable to automation. Usually, the traditional techniques require long extraction times, with more consumption of energy resources and organic solvent, have low efficiency and are often unsafe for thermolabile botanicals. The Taguchi based optimization technique was adapted for the process optimization of ultrasound assisted extraction (UAE) of Curcuma longa to identify the effect of four major factors namely, extraction time, solvent viscosity, grinding degree and solvent volume on the percentage extraction of curcumin. The reproducibility and recovery of the method was also investigated. The efficiency of the new extraction method was then compared with conventional solid liquid extraction procedures. Using this novel method, long hours of conventional Soxhlet extraction were cut down to 70 minutes of UAE with greater reproducibility and recovery. The study clearly shows that this method can be effectively utilized for cutting down long extraction time of botanicals to just a few minutes without the aid of heat.

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Cnicus benedictus Oil as a Raw Material for Biodiesel: Extraction Optimization and Biodiesel Yield

Sustainability ◽

10.3390/su132313193 ◽

2021 ◽

Vol 13 (23) ◽

pp. 13193

Author(s):

Petronela Lina Matei ◽

Cristina Busuioc ◽

Niculina Ionescu ◽

Anicuta Stoica-Guzun ◽

Nicoleta-Aurelia Chira

Keyword(s):

Extraction Methods ◽

Raw Material ◽

Extraction Time ◽

Process Efficiency ◽

Liquid Ratio ◽

Ultrasound Assisted Extraction ◽

Batch Extraction ◽

Assisted Extraction ◽

Ultrasound Assisted ◽

Solid Liquid

Cnicus benedictus fruits were used as raw material to extract oil, and the resulting oil was converted into biodiesel. Two extraction methods were tested: batch extraction, and ultrasound assisted extraction. Response surface methodology was considered for the optimization of the process efficiency. The selected key independent variables were temperature, extraction time, and solid/liquid ratio for batch extraction and ultrasound intensity, temperature, and extraction time for the ultrasound assisted extraction, respectively. The optimal working conditions are different for the two extraction techniques, with respect to temperature, solid/liquid ratio, and extraction time, respectively, leading to higher extraction efficiency in the case of the ultrasound-assisted extraction. Cnicus benedictus oil obtained under the optimal extraction conditions was further esterified with methanol under acid catalysis to yield biodiesel. The biodiesel was characterized through 1H-NMR and the main fuel properties were determined.

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Ultrasound Assisted Solid-Liquid Extraction Devices - Harnessing Active Ingredients from Plant materials – Overview and Analysis

Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering) ◽

10.2174/2405520413999201112140929 ◽

2020 ◽

Vol 13 ◽

Author(s):

Venkatasubramanian Sivakumar

Keyword(s):

Mass Transfer ◽

Cell Wall ◽

Plant Cell ◽

Plant Cell Wall ◽

Liquid Extraction ◽

Active Ingredients ◽

Plant Materials ◽

Ultrasound Assisted ◽

Solid Liquid Extraction ◽

Solid Liquid

Background: In the growing environmental concern use of natural products, efficient processes and devices are necessary. Solid-Liquid extraction of active Ingredients from Plant materials is one of the important unit operations in Chemical Engineering and need to be enhanced. Objectives: Since, these active ingredients are firmly bound to the plant cell wall membrane, which pose mass-transfer resistance and need to get detached through the use of suitable process intensification tools such as ultrasound and suitable devices. Therefore, detailed analysis and review is essential on development made in this area through Publications and Patents. Hence, the present paper illustrates the development of ultrasound assisted device for solid-liquid extraction are presented in this paper. Methods: Advantages such as % Yield, Reduction in extraction time, use of ambient conditions, better process control, avoidance or minimizing multi stage extraction could be achieved due to the use of ultrasound in extraction as compared to conventional processes. Conclusions: Use of ultrasound to provide significant improvements in the extraction of Vegetable tannins, Natural dyes for application in Leather processing has been demonstrated and reported earlier. These enhancement could be possible through various effects of ultrasound such as better flow of solvents through micro-jet formation, mass transfer enhancement due to rupture of plant cell wall membranes through acoustic cavitation, better leaching due to micro-mixing and acoustic streaming effects. This approach would minimize material wastage; thereby, leading to eco-conservation of plant materials, which is very much essential for better environment. Hence, various methods and design for application of ultrasound assisted solid-liquid extractor device are necessary.

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Comparison between Two Solid-Liquid Extraction Methods for the Recovery of Steviol Glycosides from Dried Stevia Leaves Applying a Numerical Approach

Processes ◽

10.3390/pr6080105 ◽

2018 ◽

Vol 6 (8) ◽

pp. 105 ◽

Cited By ~ 6

Author(s):

Monica Gallo ◽

Andrea Formato ◽

Gaetano Formato ◽

Daniele Naviglio

Keyword(s):

Stevia Rebaudiana ◽

Value Added ◽

Numerical Approach ◽

Extraction Process ◽

Extraction Methods ◽

Liquid Extraction ◽

Steviol Glycosides ◽

Stevia Rebaudiana Bertoni ◽

Solid Liquid Extraction ◽

Solid Liquid

Abstract: Stevia rebaudiana Bertoni is a perennial shrub belonging to the Asteraceae family. The leaves contain a mixture of steviol glycosides with extraordinary sweetening properties, among which the most important are stevioside and rebaudioside A. These components have a high sweetening power, which is about 300 times that of sucrose, and a negligible calorie content. However, their extraction and purification are not easy. In this paper, the extraction technique under cyclic pressure, known as rapid solid-liquid dynamic extraction (RSLDE), was compared using a Naviglio extractor (NE) with conventional maceration. The aim was to identify an efficient and economically viable method for obtaining high amounts of steviol glycosides in a short time. Furthermore, a numerical model was set up for the solid-liquid extraction process of value-added compounds from natural sources. Several parameters must be evaluated in relation to the characteristics of the parts of the plant subjected to extraction. Therefore, since diffusion and osmosis are highly dependent on temperature, it is necessary to control the temperature of the extraction system. On the other hand, the final aim of this work was to provide a scientific and quantitative basis for RSLDE. Therefore, the results obtained from stevia extracts using the corresponding mathematical model allowed hypothesizing the application of this model to the extraction processes of other vegetable matrices.

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A multi-residue method for determining twenty-four endocrine disrupting chemicals in vegetables and fruits using ultrasound-assisted solid–liquid extraction and continuous solid-phase extraction

Chemosphere ◽

10.1016/j.chemosphere.2020.128158 ◽

2021 ◽

Vol 263 ◽

pp. 128158

Author(s):

Lamia Hejji ◽

Abdelmonaim Azzouz ◽

Laura Palacios Colón ◽

Badredine Souhail ◽

Evaristo Ballesteros

Keyword(s):

Solid Phase Extraction ◽

Solid Phase ◽

Endocrine Disrupting Chemicals ◽

Liquid Extraction ◽

Phase Extraction ◽

Endocrine Disrupting ◽

Ultrasound Assisted ◽

Solid Liquid Extraction ◽

Vegetables And Fruits ◽

Solid Liquid

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Effects of Ultrasound-Assisted Extraction and Solvent on the Phenolic Profile, Bacterial Growth, and Anti-Inflammatory/Antioxidant Activities of Mediterranean Olive and Fig Leaves Extracts

Molecules ◽

10.3390/molecules25071718 ◽

2020 ◽

Vol 25 (7) ◽

pp. 1718 ◽

Cited By ~ 5

Author(s):

Cristina Alcántara ◽

Tihana Žugčić ◽

Radhia Abdelkebir ◽

Jose V. García-Pérez ◽

Anet Režek Jambrak ◽

...

Keyword(s):

Bioactive Compounds ◽

Bacterial Growth ◽

Extraction Methods ◽

Olive Leaves ◽

Ultrasound Assisted Extraction ◽

Phenolic Profile ◽

Assisted Extraction ◽

Ultrasound Assisted ◽

Conventional Extraction ◽

Anti Inflammatory

Mediterranean plants, such as fig and olive leaves, are well-known to exert beneficial effects in humans because of the presence of a wide range of bioactive compounds. However, scarce information regarding the impact of extraction methods, such as ultrasound and types of solvents, on their profile of antioxidant and anti-inflammatory compounds is provided. In addition, no information is available on the effects of extraction methods and solvents on the inhibition of pathogenic bacteria or promoting probiotic growth. In this scenario, this study was aimed to study the effects of ultrasound-assisted extraction (UAE) and solvent on the phenolic profile (Triple TOF-LC-MS/MS), antioxidant and anti-inflammatory compounds of olive and fig leaves. Results showed that UAE extracted more carotenoids compared to conventional extraction, while the conventional extraction impacted on higher flavonoids (olive leaves) and total phenolics (fig leaves). The antioxidant capacity of aqueous extract of fig leaves was three times higher than the extract obtained with ethanol for conventional extraction and four times higher for UAE. In general terms, hydroethanolic extracts presented the highest bacterial growth inhibition, and showed the highest anti-inflammatory activity. In conclusion, these side streams can be used as sources of bioactive compounds for further development of high-added-value products.

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