| Abstract: | A new method for analysis of sodium ortho-, pyro-, and triphosphate is reported. This procedure consists of the measurement of three values which permit a simultaneous solution of three independent equations, yielding the relative amounts of linear phosphates present in the mixture. The measured quantities were: 1) pyrophosphate, gravimetrically determined as zinc pyrophosphate, reprecipitated at 19° and at a pH of 4.0 – 4.5, 2) silver phosphate, determined by a conductance titration at 12°, of standardized silver nitrate solution, and 3) total phosphate, determined after complete hydrolysis to orthophosphate in hot acid solution. |
