La determinazione dell'ortofosfato nei fanghi provenienti dai processi di rimozione biologica del fosforo

The determination of orthophosphate by means of ascorbic acid method is precise and accurate. At the concentration of biological sludges, there were not interferences due to polyphosphate and organic phosphorus. The solid phase orthophosphate can be determined either after extraction with perchloric acid or directly to the unfiltered and filtered sludge samples