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Technic for Recovery of Volatile Components from Lipids for Gas Chromatographic Analysis¹

Department of Food Science and Technology, University of Nebraska, Lincoln 68503

ABSTRACT

A sampling system was developed which provides direct, rapid recovery of volatiles from lipids for subsequent gas-liquid chromatographic analysis. Lipid at 30% by weight is mixed with chromatographic solid support material. Lipid-coated support is packed into stainless steel tubing which is then connected to a flow-controlled nitrogen source and to the inlet of a packed gas-liquid chromatographic (GLC) column. Upon heating volatile components are eluted from the lipid and are collected in a dry ice cooled U-shaped section of the GLC column. The lipid, acting similar to stationary phase material, remains on the sample column. Recoveries with known compounds indicate a greater recovery of volatile components over a wider range than with previous purge methods for lipids

¹ Published as Paper 3217, Journal Series, Nebraska Agricultural Experiment Station. Research reported was conducted under Project 16–19