Phenols accelerated solvent extraction

In situ generated micelles have been applied to the inspection of aniline pesticidic metabolites in lake water. The separation of 16 PAH in SUA oligomer electrolytes was reported. Creosote-contaminated soil samples were extracted by accelerated solvent extraction using methylene chloride-acetone mixtures. The extracts were further fractioned by gel permeation chromatography before analysis. The EKC chromatogram of a creosote-contaminated soil fraction shows the resolution of at least 50 peaks. The separation of the 11 priority phenols in river and sea water was demonstrated in MEKC with DBTD surfactants, whereas examples of the use of liposomes as carriers include the separation of benzene derivatives and phenols." ... 

A relatively new automated extraction method is PLE, also called accelerated solvent extraction (ASE), which is based on an extraction under elevated temperature (50-200°C) and pressure (3-205 bar) during a short period of time (5-15 min). This technique has been used for the extraction of phenolic compounds from foods such as vegetables and fruits. In PLE, a solid sample is packed into the extraction cell and analytes are extracted from the matrix with conventional low-boiling solvents or solvent mixtures at elevated temperatures up to 200°C and pressure (30-200 bar) to maintain the solvent in the liquid state [61]. 

Phenols are an important group of phytochemicals with significant health beneficial effects. Extraction of phenols firom the biological sources is a growing field of interest and is an integrated part of analytical methods. Some of the common methods of extraction of phenolic compounds are solvent extraction, accelerated solvent extraction, supercritical fluid extraction, ultrasonic extraction, and microwave extractimi. Separation is the next important step of analytical methods, which is done to separate the required phenolic components from the unwanted part of the extract. In case of phenols, methods such as... 

A JEOL JSM 840 SEM with an acceleration voltage of 20 kV was used for studying the surface morphology of the specimens. To extract the PET component from the specimens, a mixture of phenol/l,l,2,2-tetrachloroethane in 60/40 wt% was used as the solvent. Similarly, to remove PP and retain the PET fibrils, the specimens were treated with hot xylene. AH the specimens were coated with a thin gold layer prior to SEM analysis. The diameters of about 100 fibrils were measured from the micrographs of stretched samples using image analysis software. 

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