(Introduction)
Experimental
　Reagents
　Standard phosphate solutions
　Treatment of apparatus
　Procedure
　Beer's law and reproducibility
　Salt error
　Interferences

『Summary
　A single solution reagent is described for the determination of phosphorus in sea water. It consists of an acidified solution of ammonium molybdate containing ascorbic acid and a small amount of antimony. This reagent reacts rapidly with phosphate ion yielding a blue-purple compound which contains antimony and phosphorus in a 1 : 1 atomic ratio. The complex is very stable and obeys Beer's law up to a phosphate concentration of at least 2μg/l. The sensitivity of the procedure is comparable with that of the stannous chloride method. The salt error is less than 1％.』

References