Mohammad Ali Taher. "Preconcentration of Trace Vanadium with the Ion Pair of 2-Nitroso-1-Naphthol-4-Sulfonic Acid and Tetradecyldimethylbenzylammonium Chloride Onto Microcrystaline Naphthalene and Determination by Derivative Spectrophotometry". Iranian Journal of Chemistry and Chemical Engineering, 18, 2, 1999, 64-71. doi: 10.30492/ijcce.1999.10058