Fluorimetric Method for the Determination of Cortisol in Small Quantities of Salmonid Plasma

Abstract
A method is described for the fluorimetric determination of cortisol in 1-ml aliquots of salmonid plasma. Validation experiments are presented which indicate that the reliability of the method is satisfactory. The method provides the means for the determination of low cortisol concentrations, such as those encountered in hypophysectomized or resting salmonids (0.01–0.05 μg/ml).