Micellar extraction preconcentration of barium with phases of nonionic surfactants at the cloud point.Published in:Journal of Analytical Chemistry, 2009, v. 64, n. 10, p. 1012, doi. 10.1134/S1061934809100062By:Doroshchuk, V. A.;Demchenko, V. Ya.;Gorbachevskii, A. N.;Chernyi, A. V.;Kulichenko, S. A.Publication type:Article