Differential Pulse Polarographic Determination of Trace Amount of Bismuth in Various Complex Samples After Preconcentration of Its 1-(2-Pyridylazo)-2-naphthol Complex by Column and Microcrystalline Naphthalene Methods

Simultaneous Determination of Cadmium an

Simultaneous Determination of Cadmium and Lead in Real and Environmental Samples by Differential Pulse Polarography after Adsorption of Their 2-Nitroso-1-naphthol-4-sulfonic acid–Tetradecyldimethylbenzylammonium Ion-Associated Complex on Microcrystalline Naphthalene

✍ Mohammad Ali Taher; Bal Krishan Puri; R.K. Bansal 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 101 KB

Cadmium and lead form 2-nitroso-1-naphthol-4-sulfonic acid-tetradecyldimethylbenzylammonium ion-associated complexes which are quantitatively adsorbed on microcrystalline naphthalene in the pH ranges 5.7-11.0 and 8.0-10.5, respectively. After filtration, the solid mass is shaken with 10 ml of 1 M hy