The document specifies the method for the extraction of phosphorus soluble in 2 % formic acid (20 g per litre).The method is applicable to soft natural phosphates exclusively.
DIN SPEC 1092:2010 history
2011DIN EN 15919:2011 Fertilizers - Extraction of phosphorus soluble in 2 % formic acid; German version EN 15919:2011
2010DIN SPEC 1092:2010 Fertilizers - Extraction of phosphorus soluble in 2 % formic acid; German version CEN/TS 15919:2009