title: Assessment of automated nitrogen analysis of biological fluids with reference to the Kjeldahl method.
mesh_terms: D001322:Autoanalysis; D005243:Feces / Q000032:analysis; D005504:Food Analysis; D006801:Humans; D008722:Methods; D009536:Niacinamide; D009584:Nitrogen / Q000032:analysis*
chemical_list: D009536:Niacinamide; D009584:Nitrogen