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6549132
Methods Of Extraction
Descrição
Mind Map of Lect.1&2 Methods of Extractions
Sem etiquetas
phyto_chemistry
dr.menna fathy
3rd year fopcu
phytochemistry
Mapa Mental por
Menna Fathy
, atualizado more than 1 year ago
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Menna Fathy
quase 8 anos atrás
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Methods Of Extraction
Mechanical
No solvent Hydralic Pressure only
F.O of Seeds
Maceration
Solvent + 3 days + RT
Percolation
Maceration + Continous Fresh solvent Flow
Digestion
Maceration + Gentle Heat
Infusion
Maceration short time
Readily Soluble Cpds
Decoction
Boiling for 15'
Thermostable Cpds
Continous HOT extraction Using Soxhlet Extractor
P.M is repeatedly extracted with solvent & the dissolved const. are conc. In the extraction flask
Thermostable Cpds & If Thermoliable use Low B.P solvent
UAE
Ultrasonic Energy + Pressure
High Temp = Inc. Solubility & Diffusion of Const. in solvent
The oxidative energy from radicals Created during the process Inc. Extraction Power
If Pressure is Applied inc. Penetration & Transport Between Solvent & P.M
MAE
Microwaves --> Agitation + Heat Energy
If Pressure is Applied inc. Penetration & Transport Between Solvent & P.M
PLE
Extraction with Liquid solvent under High Temp Inc. Diffusion Rate & Solubility & High Pressure Keep solvent Below B.P
SFE
Carbondioxide Gas Under Critical Temp. = Gas--> Liquid
Available & cheap Inert Non-toxic Non-inflammable Easy to eliminate Has low critical temp. ( 31o C at P= 74 bar )
SPE
Solid phase pre-packed in column = stationary phase + solvent
to isolate / purify a sub or sample of interest from a more complex sample Eg: Before analysis of Biological samples
SPME
Analysis of some V.O containing drugs In GC & LC Analysis of Dilute samples in both gaseous & Liquid states Adsorptive phase : silicone Fibers
Distillation
Steam Distillation
V.O
Thermo-Micro-Distillation
For Analytical separation of Vol. const. Steam distillation on a semi – micro scale
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