This document specifies references to methods for the determination of the content of the following specific nutrients in inorganic fertilizers: the total nitrogen content; the ammoniacal nitrogen content; the nitric nitrogen content; the urea nitrogen content; the content of nitrogen from isobutylidenediurea (IBDU) and crotonylidenediurea (CDU); the cyanamide nitrogen content; the methylene-urea nitrogen content (and urea formaldehyde, if applicable); the total P2O5 content; the water-soluble P2O5 content; the neutral ammonium citrate soluble P2O5 content; the water-soluble K2O content; the total MgO content; the water-soluble MgO content; the total CaO content; the water-soluble CaO content; the total SO3 content; the water-soluble SO3 content; the total Na2O content; the water-soluble Na2O content. This document is applicable to EU fertilizing products classified as PFC 1(C) and PFC 7 as long as the blend only consists of EU fertilizing products classified as PFC 1(C), PFC 2 and PFC 5 as specified in the Regulation (EU) 2019/1009 [1].