[Quantification of ammonia in a sample of rumen contents and fermentation with a gas diffusion electrode].

The use of an electrode for the determination of ammonia in rumen and fermentor fluid samples has been evaluated. The amount of interfering volatile bases was negligible in our samples. The memory effect was only significant at the limits of the ammonia concentration range. The results from the electrode method were linearly correlated with the values from the standard colorimetric method (slope = 1.009; R = 0.998).