Quantification of Ammonium Sulphate Nitrate (ASN) fertilizers

6 páginas, 4 figuras, 1 tabla.This paper shows a simple procedure for the quantification of industrial and labo-ratory samples of Ammonium Sulphate-Nitrate fertilizers (ASN) based on a Rietveld fit from X-ray powder diffraction profiles. The Rietveld fit is performed by means of the structural models of the double salts 2NH4NO3·(NH4)2SO4 and 3NH4NO3·(NH4)2SO4, previously re-ported by the authors. The proposed method demonstrated to be highly accurate even when medium-low quality X-ray Powder Diffraction profiles are used. The result of the composi-tion of H, N and S in the samples is very similar to those obtained by elemental analysis.The authors gratefully acknowledge Fertiberia S.A. for supplying sam-ples 1 and 4, FEDER funding, MICINN Projects MEC-06-MAT-2006-01997, MAT2010-15094, MEC-06-CTQ2006-14644-C02-01 and Factoría Española de Cristalización – CSD2006-00015 for financial support.Peer reviewe