Analytes And Microwaves Lab Report

Accelerated and Microwave- Assisted Extraction

Accelerated solvent extraction is a useful and efficient technique for extraction of desired analytes from solid sample into the solvent. Both sample and solvent are placed in a closed vessel and heated to 50 to 200oC. The high temperature accelerates the dissolution of analytes in solvents and high pressure causes permits the heating above boiling point. Two advantages of accelerated extraction:
1) Reduced time of extraction
2) Decreased amount of required solvent

ASE is a patented method for the extraction of semisolid and solid sample matrices using ordinary solvents at elevated temperatures and increased pressures.

Extractions which complete normally in hours can now be done in minutes

Polyhenols from Green Tea.
2.Carotenoids from Paprika powders 2 7
3. glycyrrhizic acid from liquorice root2 8
.4. Cocaine and benzoylecgonine from coca leaves 3 0
11. Oil from olive seeds 7
12. lipids from several oleaginous seeds7
References : 1) Be´atrice Kaufmann and Philippe Christen : Recent Extraction Techniques for Natural Products: Microwave-assisted Extraction and Pressurised Solvent Extraction; Phytochem. Anal. 13, 105–113 (2002) (3) http://chromblog.thermoscientific.com/blog/bid/84054/Accelerated-Solvent-Extraction-Bioanalytical-Samples
27 Csiktusna di Kiss GA , Forgacs E , Cserhati T ,Mota T, Moras H , Ramos A. Optimisation of microwave assisted extraction of pigments from paprika (Capsicum Annum L. ) powders J.Chromatogr. A 2000 ; 889 ;41-49
28 Pan X, Liu H ,Jia G , Shu yy . microwave assisted extraction of glycyrrhizic acid from Licorice root .Biochem. Eng.J 2000 ; 5 ; 173-177
30 Brachet A, Christen P, Veuthy JL. Focused microwave assisted extraction of cocaine Benzolecgonine from cocoa leaves. Phytochem. Anal 2002 ; 13 ; 169-173
7 Garcia Ayuso LE , Luque De , Castro MD . A multivariate study of performance of a microwave –assisted soxhelt solvent extractor for Olive seeds . Anal .Chim .Acta 1999 ; 382 ;