This Europcan standard specifies a spectrophotometric method for the determination of phosphorus in steel and cast iron.
The method is applicable to phosphorus contents between 0.005 and 1.5 % (m/m), provided that tungsten, niobium, tan-talum and zirconium contents are not higher than 1 % (m/m) for each of these four elements and titanium content is not higher than 2% (m/m).