%0 Journal Article %T Study of competitive transport of some heavy metal cations across bulk liquid membranes containing phenylaza-15-crown-5 and cryptand 222 as carriers using flame atomic absorption spectrometry %A Tarahomi, Somayeh %A Ronaghi, Gholam Hossein %A CHamsaz, Mahmod %J Russian Journal of Applied Chemistry %@ 1070-4272 %D 2015