Colina, Marinela, P. H. Gardiner, Zulay Rivas, and Federico Troncone. “Modified Procedure for the Simultaneous Determination of Nitrogen, Phosphorus and Sulphur by Hydrogen Peroxide Microwave Digestion and Ion Chromatography”. Ciencia 14, no. 1 (1). Accessed December 5, 2025. https://produccioncientificaluz.org/index.php/ciencia/article/view/9316.