Post-extraction solvent flush of the pressure restrictor in supercritical fluid extraction

Document Type

Article

Publication Date

1-1-1991

Abstract

When using supercritical fluid extraction to isolate and concentrate pesticide residues from plant tissue samples, extraneous components of the plant matrix are extracted in sufficient quantity to cause intermittent obstruction of the pressure restrictor. In some cases, termination of the extraction occurs due to irreversible plugging of the restrictor. It has been determined that a post-extraction solvent flush of the pressure restrictor is sufficient to prevent restrictor obstruction in almost all cases. © 1991.

Publication Title

Journal of Chromatography A

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