title: Rapid determination of total nitrogen in biological materials with chromic acid.
mesh_terms: D002840:Chromates; D003124:Colorimetry / Q000379:methods; D007202:Indicators and Reagents; D009584:Nitrogen / Q000032:analysis*; D010944:Plants / Q000032:analysis; D013997:Time Factors
chemical_list: D002840:Chromates; D007202:Indicators and Reagents; D009584:Nitrogen