Determination of Phosphorus in Organic Compounds.. Rapid Micro and Semimicromethod

Micro-Carius Determination of Phosphorus in Organic Compounds.

“…A sealed tube method for the determination of phosphorus has been used by Schaffer, Fong, and Kirk (4), in wffiich samples containing microgram amounts of phosphorus were completely destroyed by heating with sulfuric acid to a temperature of 460°C. The Schoniger flask combustion procedure also was applied for the destruction of organophosphorus compounds (2). However, the determination of phosphorus by the well known Carius combustion method has not found many adherents, for low results are obtained because of the formation of a white insoluble substance on the inside of the Carius tube.…”

Volumetric and Gravimetric Analytical Methods of Organic Compounds

“…After combustion of the sample on filter paper in a flask of oxygen, the P205 formed is converted to orthophosphate and precipitated as MgNHgPCh. This precipitate is filtered, dissolved, treated with an excess of ethylenediaminetetraacetic acid, the excess of which is titrated with a standard magnesium solution (54).…”

Rapid Determination of Phosphorus in Motor Oils and Additives

“…Halogens (11,12), sulfur as sulfate (1,7,12), and phosphorus as orthophosphate (S, 4) termination of phosphorus as the phosphomolybdivanado complex has been achieved by modifying the oxidation scheme in two respects:…”