Green Extraction of Natural Products

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Most companies in the food and pharma industries use conventional extraction methods such as those using solvents, or steam and hydro-distillation. Recent trends in extraction techniques have largely focused on minimizing the use of petroleum-based solvents. Recently, more efficient green extraction methods, such as subcritical water extraction (SWE), supercritical fluid extraction (SFE), and microwave assisted extraction (MAE) have been used for the isolation of organic compounds from various plants. These extraction techniques are not only cheaper and faster, but being considered environmentally-friendly, they would also enable these products to claim a green label. Having a green label is desirable to many customers.
SWE as a method, is non-toxic, non-flammable, fast, cheap, readily available, safe, environmentally friendly and uses a green solvent. The extraction of phenolic compounds, flavonoids, flavor, fragrances and essential oils have been carried out using SWE and both qualitative and quantitative results obtained. SFE (usually CO2) is relatively fast due to the low viscosity, high diffusivity, and tunable solvent power of the supercritical fluid. SFE is considered a safe and green technology. MAE is a relatively new extraction technique that combines microwave and traditional solvent extraction. Microwaves are applied to heat the solvents and plant tissues in the extraction process, which increases the kinetics of extraction.
Qualitative and quantitative analysis for natural products can be carried out using advanced analytical equipment such as the Electronic nose, GC-NCD/SCD and headspace GC-MS. Each system has its own advantages. The Electronic nose performs overall odour-profiling and fast chemical composition analysis in one run. The GC-NCD/SCD instrument brings significant new capabilities for nitrogen or sulphur-containing applications. Headspace GC-MS sampling is excellent for the qualitative or quantitative analysis of volatile species in samples from either a liquid or solid matrix.
Original languageEnglish
Publication statusPublished - 12 Nov 2021
EventInternational Conference on Green Chemistry and Environmantal Engineering (CECE-2021) - Webinar, On-line, Rome, Italy
Duration: 2 Dec 20214 Dec 2021


ConferenceInternational Conference on Green Chemistry and Environmantal Engineering (CECE-2021)
Abbreviated titleICECE-2021
OtherGreen Chemistry and Environmental Engineering conference shares an insight into the current research and cutting edge technologies that have an impact on the sustainability of human society and the best operation of planetary environments.


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