recent advances in extraction of nutraceuticals from plants.pptx

8/10/2019 RECENT ADVANCES IN EXTRACTION OF NUTRACEUTICALS FROM PLANTS.pptx

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RECENT ADVANCES INEXTRACTION OF

NUTRACEUTICALS FROM PLANTS

PRESENTED BY : GAURAV AGRAWAL

P.I.E.T NAGPUR


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NUTRACEUTICALSNutraceuticals are type of food supplement.

It has medical benefit, including prevention and

treatment of chronic diseases.Nutraceuticals are ranging from isolated

neutrients,dietary supplements,herbal products andprocessed food products.

They are extracted from plant ,food and microbialresources

Beta carotene and lycopene are examples ofnutraceuticals.


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METHODS OF EXTRACTIONConventional Advanced

Soxhlet extraction.

Hydrostillation.

Maceration

Sonication-assisted

extraction.Microwave-assisted

extraction.

Supercritical fluid

extraction.Accelerated solvent

extraction.


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Soxhlet Extraction


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PRACTICAL ISSUES WITH SOXHLETSolvent choice.

More time required for extraction for large paticles

size.The extraction and evoporation temperature have

significant effect on final product


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SONICATION ASSISTED EXTRACTION


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MECHANISM OF PROCESS


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CHARCTERSTICS OF ULTRASOUNDUltrasound frequency has great effects on extraction

yield and kinetics.

Additional agitation or shaking is usually used.It can also used for thermolaible compounds.

Sonication time should be optimize.

Extraction temperature should be control.


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Advantages Disadvantages

Ultrasound-assistedextraction is an inexpensive,simple and efficientalternative to conventionalextraction techniques.

Its apparatu is cheaper and its

operation is easier. It canbe used for any solvent.

Kinetics and yield areincreased.

Kinrtics and yield depends ontype of plant matrix.

The presence of a dispersedphase contributes to theultrasound wave attenuation.


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MICROWAVE ASSISTED

EXTRACTION


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MECHANISM OF PROCESSMicrowaves are electromagnetic radiations with a

frequency from 0.3 to 300 GHz.

Microwaves are transmitted as waves,works on conceptof penetration.

Cell disruption is promoted by internal superheating.

The migration of dissolved ions increased solvent

penetration into the matrix and thus facilitated therelease of the chemicals.


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CHARACTERSTICSMAE depends on the dielectric susceptibility of solvent

and matrix.

The microwave heating leads to the expansion andrupture of cell walls and is followed by the liberation ofchemicals into the solvent.

Plant particle size and size distribution usually have a

significant influence on the efficiency of MAE.A lower ratio of solvent volume to solid matrix mass

should be maintained.

Temperature should be optimized.


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Advantages Disadvantages

reduced extraction time .

reduced solvent usage . improved extraction yield.

Filtiration is needed.

It has poor efficiency in caseof no

npolar and volatiletargetcompounds.

It gives loe results for dry

plant matrix.


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SUPER CRITICAL FLUID EXTRACTION


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MECHANISM OF PROCESS


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CHARACTERSTICSSupercritical f luid should be care fully choosed.

Low moisture content are peferable.

Small size particles gives good efficiency.The temperature and density of the fluid control the

solubility.


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Advantages

SFE offers unusualpossibilities for selective

extractions andfractionations.

The dissolved nutraceuticalcompounds can berecoveredfrom the fluid by

the reduction of the densityof the supercritical fluid.

Its diffusivity is twice thanother methods.

Its operating cost is very high.


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SCOPE FOR FURTHER STUDIESMore attention is requried in thermodynamic studies.

Modeling of novel extraction processes can provide abetter understanding of the extraction mechanisms.


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CONCLUSIONNovel techniques saves time , solvent,

It increases kinetics and yield.

It can over take conventional methods in industrialapplication.

However lot of work need to be done in this path.


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Thank you

recent advances in extraction of nutraceuticals from plants.pptx

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