Patent ID: 7125385

Claim:
A method for determining a recommended dose of a chemical sterilant to be infected into a first and second scrotal testis of a mammal comprising: a) providing an instrument for measuring a mammalian scrotal testis having a pair of relatively displaceable jaws with testis contacting surfaces whose spacing is displayed on a scale calibrated to a recommended dose of the chemical sterilant at a given concentration for the testis measured wherein the chemical sterilant is an aqueous solution comprising 13.1 mg/ml of zinc as zinc gluconate neutralized by 34.8 mg/ml of l-arginine with a pH adjusted in a range of 6.0 to 7.5 with hydrochloric acid; b) placing a male animal to be sterilized in supine position; c) holding the first testis of the animal and extending it until a testicular outline is seen through a scrotal wall; d) placing the first testis between the jaws of the instrument and reducing a spacing between the jaws until the testis is firmly gripped; e) reading the recommended dose on the scale; f) repeating steps (c) through (e) for the second testis.