title: Photometric determination of manganese in water by using o-tolidine.
mesh_terms: D001713:Biphenyl Compounds; D008345:Manganese / Q000032:analysis*; D008722:Methods; D010783:Photometry; D014052:Toluidines; D014867:Water / Q000032:analysis*
chemical_list: D001713:Biphenyl Compounds; D014052:Toluidines; D014867:Water; D008345:Manganese