THYROTROPIN ASSAY BASED ON THE DEPLETION OF IODINE IN CHICK THYROIDS

Abstract
A thyrotropin assay method based on the depletion of thyroid I was developed which is dependent on a comparison (by means of the log dose method of Irwin) of responses obtained from unknown TSH (thyrotropin) prepns. run at 1 or 2 levels to the responses obtained from-2-3 levels of a standard thyrotropin prepn. The 2 level assays gave TSH potencies with a standard error of approx. 25%.