Differential pulse polarographic determination of tin in alloys and environmental samples after preconcentration with the ion pair of 2-nitroso-1-naphthol-4-sulfonic acid and tetradecyldimethylbenzylammonium chloride onto microcrystalline naphthalene or by column method

aguas residuales aleaciones alliage alloys cendre volante desechos effluents fly ash measurement mesure polarografia polarographie polarography polvo de cenizas sediment sedimento soil sol suelo tin wastes wastewater