1 Scope
This Technical Specification specifies a method for the determination of phosphorus
in fertilizer extracts.
The method is applicable to all extracts of fertilizers for the determination of the
different forms of phosphorus as phosphorus soluble in mineral acids, water soluble
phosphorus, phosphorus soluble in solutions of ammonium citrate, phosphorus soluble
in 2 % citric acid and phosphorus soluble in 2 % formic acid.