The method is selectively based on the cloud point extraction (CPE) of Sn(IV) with
Gallocyanin (GC+) and glycine as chelating agents in the mixed surfactant media, Polyethylene glycol sorbitan
monolaurate (Tween 20) and Cetylpyridinium chloride (CPC) in Tris/HCl buffer, pH 8.5