Organophosphorus compounds: I. Simple,rapid, and reliable method for the simultaneous microdeterminaton of carbon,hydrogen, and phosphorus by the rapid straight empty tube method

A method for the simultaneous microdetermination of C, H, and P is presented. The organophosphorus compound is pyrolyzed in a 80-mm long silica sample capsule using the rapid straight empty tube method. Carbon and hydrogen are determined by conventional gravimetry. Oxides of phosphorus are quantitatively retained on the walls of the capsule. The P₅O₂, uptake is determined gravimetrically for the phosphorus determination.Organophosphorus compounds containing sulfur can also be analyzed following the same procedure. Electrolytic silver, heated at 550 °C, absorbs the oxides of sulfur. The results obtained fall within the acceptable limits of error.