This Technical Specification specifies a method for the determination of magnesium in fertilizer extracts.
The method is applicable to the following EC fertilizer extracts for which the determination of total magnesium
and/or water-soluble magnesium is provided for according to the Regulation (EC) No 2003/2003, Annex I [3]:
? fertilizers listed in [3], Annex I: straight nitrogenous fertilizers, type 1b + 1c (calcium magnesium nitrate),
type 7 (magnesium sulfonitrate), type 8 (nitrogenous fertilizers with magnesium) and straight potassic
fertilizers, type 2 (enriched kainite), type 4 (potassium chloride containing magnesium), type 6 (potassium
sulfate containing magnesium salt);
? fertilizers listed in [3], Annex I D relating to secondary nutrients.