0000000000684626

AUTHOR

Karin Schäfer

showing 2 related works from this author

Solubility of some pesticides in supercritical CO2

1988

The solubility limits of some pesticides (Linuron, Methoxychlor, Diclofopmethyl, Diclofop and 2,4-D) and of 3,4-dichloroaniline have been determined in supercritical CO2 at 200 bar and 40° C, using the Milton Roy sample preparation accessory SPATM. Depending on the polarity and vapour pressure of the investigated compounds, the solubility was found to be between 0.3 and 12 gl−1.

ChromatographyVapor pressureClinical BiochemistrySupercritical fluid extractionMethoxychlorGeneral MedicinePesticideSupercritical fluidAnalytical Chemistrychemistry.chemical_compoundchemistryGeneral Materials ScienceSample preparationSolubilityBar (unit)Fresenius' Zeitschrift für analytische Chemie
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Supercritical fluid extraction of pesticides

1989

The extraction behaviour of 10 μg samples of five pesticides and some related compounds from glass wool with supercritical CO2 has been investigated under several conditions (10 MPa, 20 MPa extraction pressure, 313 K, dry and water saturated CO2). The extraction fluid was decompressed over a line of little columns, filled with 3μ Si60 or RP18, and the amount of deposited material was analyzed by HPLC for each of these columns. Due to the progressive pressure/density reduction along the line, the solubility diminishes and hence the compounds are deposited according to their polarity/vapor pressure earlier or later on the line. Thus extraction and prefractionation of compounds of different po…

ChromatographyChemistryVapor pressureClinical BiochemistryExtraction (chemistry)Analytical chemistrySupercritical fluid extractionGlass woolGeneral MedicineBiochemistryHigh-performance liquid chromatographySupercritical fluidAnalytical ChemistryGeneral Materials ScienceSample preparationSolubilityFresenius' Zeitschrift f�r Analytische Chemie
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