Analytical uses of ultrasounds

Castro, M. D. Luque de; García, José Luis Luque

doi:10.1016/s0167-9244(02)80005-1

Cited by 4 publications

(1 citation statement)

References 125 publications

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“…UAE may be faster/safer in the case of acid digestion, as it is possible to work at lower pressures/temperatures when using this method, and simpler procedures lead to lower contamination risks. However, the requirements of the particle size distribution of the feedstocks necessitates important pre-treatment steps, and the robustness of the probe surface may also be an issue [ 151 ]. In the case of extractions from grape seeds, UAE for 30 min gave similar results to Soxhlet extraction conducted for 6 h, with no significant differences in the fatty acid content.…”

Section: Extraction Methods For High-value Chemicalsmentioning

confidence: 99%

Extraction of High-Value Chemicals from Plants for Technical and Medical Applications

Kapadia

Newell

Cunningham³

et al. 2022

IJMS

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Plants produce a variety of high-value chemicals (e.g., secondary metabolites) which have a plethora of biological activities, which may be utilised in many facets of industry (e.g., agrisciences, cosmetics, drugs, neutraceuticals, household products, etc.). Exposure to various different environments, as well as their treatment (e.g., exposure to chemicals), can influence the chemical makeup of these plants and, in turn, which chemicals will be prevalent within them. Essential oils (EOs) usually have complex compositions (>300 organic compounds, e.g., alkaloids, flavonoids, phenolic acids, saponins and terpenes) and are obtained from botanically defined plant raw materials by dry/steam distillation or a suitable mechanical process (without heating). In certain cases, an antioxidant may be added to the EO (EOs are produced by more than 17,500 species of plants, but only ca. 250 EOs are commercially available). The interesting bioactivity of the chemicals produced by plants renders them high in value, motivating investment in their production, extraction and analysis. Traditional methods for effectively extracting plant-derived biomolecules include cold pressing and hydro/steam distillation; newer methods include solvent/Soxhlet extractions and sustainable processes that reduce waste, decrease processing times and deliver competitive yields, examples of which include microwave-assisted extraction (MAE), ultrasound-assisted extraction (UAE), subcritical water extraction (SWE) and supercritical CO2 extraction (scCO2). Once extracted, analytical techniques such as chromatography and mass spectrometry may be used to analyse the contents of the high-value extracts within a given feedstock. The bioactive components, which can be used in a variety of formulations and products (e.g., displaying anti-aging, antibacterial, anticancer, anti-depressive, antifungal, anti-inflammatory, antioxidant, antiparasitic, antiviral and anti-stress properties), are biorenewable high-value chemicals.

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Section: Extraction Methods For High-value Chemicalsmentioning

confidence: 99%

Extraction of High-Value Chemicals from Plants for Technical and Medical Applications

Kapadia

Newell

Cunningham³

et al. 2022

IJMS

View full text Add to dashboard Cite

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Bioproduct Extraction From Microbial Cells by Conventional and Nonconventional Techniques

et al. 2017

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Towards a comprehensive exploitation of agrofood residues: Olive tree – olive oil as example

Castro

2014

Comptes Rendus. Chimie

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A comprehensive use of residues from the agrofood industry requires development of a number of steps -discussed in this article taking as a model the olive tree -olive oil binomial -consisting of: (i) extraction, identification and quantitation of valuable products (with isolation of individual compounds, if required); (ii) assessment of beneficial effects (which could be made mainly through metabolomics); (iii) improvement of cultivation varieties (through cross-breeding or other agricultural resources); (iv) commercialization as nutraceuticals, food supplements, pharmaceuticals or even as antibacterial and antifoam agents in water treatment plants; (v) use of the final residues to produce compost, foodstuffs, biogas or heat (after checking the characteristics of these residues which can be very different from those of the original residue). This working scheme may be applied to any other system to break the traditional one cultivation-one commercial product scheme.

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Analytical uses of ultrasounds

Cited by 4 publications

References 125 publications

Extraction of High-Value Chemicals from Plants for Technical and Medical Applications

Extraction of High-Value Chemicals from Plants for Technical and Medical Applications

Bioproduct Extraction From Microbial Cells by Conventional and Nonconventional Techniques

Towards a comprehensive exploitation of agrofood residues: Olive tree – olive oil as example

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