This document specifies references to methods for the determination of the following specific parameters in ammonium nitrate fertilizers of high nitrogen content: - the nitrogen content as a result of ammonium nitrate; - pH of a solution of ammonium nitrate fertilizers of high nitrogen content; - the particle size of ammonium nitrate fertilizers of high nitrogen content; - the chloride content; - the copper content. This document is applicable to EU fertilizing products classified as PFC 1(C)(I)(a)(i-ii)(A) and PFC 7 as long as the blend only consists of EU fertilizing products classified as PFC 1(C), PFC 2 and PFC 5 and still fulfils the requirements for PFC 1(C)(I)(a)(i-ii)(A) as specified in the Regulation (EU) 2019/1009 [1].