SummaryAdditives and oligomers from polymers were quantitatively extracted and separated using on-line SFE and capillary SFC. Conditions were found which extracted the additives selectively molecular mass, non-volatile compounds [17][18][19][20][21]. Capillary SFC has been particularly applicable because of the high resolution available.and separated them from the co-extracted oligomers.

SummaryCapillary supercritical fluid chromatography was performed using solvent-vented injection in conjunction with a thermionic ionization detector. Mixtures of organo-nitrogen and phosphorus containing agrochemicals were chromatographed and detection of low picogram quantities was observed.

Samples of soil were spiked with known concentrations of atrazine and extracted with supercritical carbon dioxide. Quantitative analysis of the extracts was carried out by capillary gas chromatography and the kinetics of extraction were fitted t o the 'hot-ball' model. The conditions for extraction were predicted from calculated solubilities using the Peng-Robinson equation of state, and were in satisfactory agreement with experiment.

No abstract

No abstract