Lipid removal using semipermeable membranes (SPMs) in PCDD and PCDF analysis of fat-rich environmental samples

We have studied the kinetics of lipid removal using the semipermeable membrane technique (SPM) during preparation of fat rich environmental samples for analysis of lipophilic substances such as dioxins. This is a useful alternative to the conventional methodologies (both destructive and non-destructive). For herring fat, the dialysis was found to be almost complete after two solvent replacements. Our study also showed recoveries exceeding 80% for a series of PCDFs and PCDFs in various biotic samples.