The assay of gastrin using the perfused rat stomach

Abstract
1 A method is described for the bio-assay of gastric secretagogues using the perfused rat stomach in which the acid output can be readily and accurately quantified. 2 This technique increases the sensitivity of the perfused rat stomach so that 10–20 ng of synthetic human gastrin I can be detected. 3 It is possible to assay secretagogues, relative to a standard with fiducial limits of less than ±30%. 4 The use of this system is illustrated by assays comparing synthetic human gastrin I with pentagastrin, pure hog gastrin and gastrin added to plasma.