Saber Tehrani, Mohammad, Jahan B. Ghasemi, and Mohammad Taghi Baharifard. “Simultaneous Spectrophotometric Determination of Zinc, Cadmium and Lead by Xylenol Orange Using the Partial Least Squares Method After Their Preconcentration by 5,10,15,20-Tetrakis(4-Carboxylphenyl)porphyrin on Amberlite IRA-402 Resin”. Asian Journal of Chemistry 24, no. 7 (March 12, 2012): 3078–3086. Accessed November 27, 2024. https://asianpubs.org/index.php/ajchem/article/view/9298.