GLC determination of quinaldine residue in fish

A procedure for the determination of quinaldine residue in various fish tissues is described.
Homogenized tissues are extracted wi th hexane-ethyl ether, the extracts are concentrated
by partitioning through O.IN sulfuric acid, and the residues are measured by alkali Harne
ionization gas chromatography. Muscle tissues containing from 0.01 to 10.0 ppm quinaldine
were successfully analyzed with recoveries from 75 to 100%.