title: [Analytical methods for nitrate and nitrite in feeds. 1. Spectrophotometric determination of nitrate with o-cresol].
abstract: The o-cresol procedure which is used for determining nitrate in feeds is tested for precision. The treatment of the samples and the course of analysis are rationalized. The method is recommended as a standard procedure for biological materials; it is suited as a reference technique in elaborating new analytical procedures.
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D003408:Cresols; D007202:Indicators and Reagents; D009566:Nitrates / Q000032:analysis*; D009573:Nitrites / Q000032:analysis; D013053:Spectrophotometry / Q000379:methods
chemical_list: D003408:Cresols; D007202:Indicators and Reagents; D009566:Nitrates; D009573:Nitrites
vernacular_title: Zur Nitrat- und Nitritanalytik in Futtermitteln. 1. Mitt. Spektrophotometrische Bestimmung von Nitrat mit o-Kresol.