Abstract
Abstract
A polarographic method has been developed for the determination of nitrates in silage. After a Florisil-Norit cleanup, the chromium (III)-glycine complex of Hamm and Withrow is used. A comparison of the results obtained by the polarographic and a colorimetric method shows that the results are valid when a high concentration of nitrates (500—5000 ppm) is present in the silages. Nitrite interference must be eliminated by sulfanilic acid; data are presented to show recoveries and destruction of nitrite