A microdiffusion method for the determination of nitrogen liberated as ammonia.

Abstract

Abstract A microdiffusion method for the determination of ammonia, which employs a simple diffusion cell and a mechanical rotator, is described. Total nitrogen is readily measured using the diffusion cell as a digestion vessel first and as a diffusion chamber later. The procedure can be adapted to the measurement of urea and other compounds which liberate ammonia stoichiometrically. The range can be adjusted from 2 to 200 μg of nitrogen; the most convenient range being 10 to 25 micrograms. In our hands this method has proved simple, rapid, and accurate.