Abstract: The Complexation reactions between divalent metals (Ni²⁺,Cd²⁺,Zn²⁺,Mn²⁺,Pd²⁺, Hg²⁺, Pb²⁺ ) and l-(2-pyridylazo)-2-naphthol (PAN) in the presence of Triton X-100 micellae have been investigated spectrophotomet-rically. It is concluded that Me²⁺ -PAN-Triton-X-100 systems may be regarded as pseudo-phase extraction.The following general formula for solubilizing extraction of Me²⁺-PANchelates by nonionic surfactants of polyoxyethylene type has been deduced.It resembles as that of solvent extraction system. The validity of the formula was tested by using it for solubilizing extraction of Ni²⁺-PAN, Mn²⁺-PAN, Zn²⁺-PAN, Cu²⁺-PAN and Cd²⁺-PAN, while the pseudo-phase extraction model of Me²⁺-PAN-Triton X-100 systems further proved.The causes of possible deviation for using the formala is also pointed out.