Abstract The aim of this study was to develop an analytical method determine free concentrations Europium (Eu(III)) in natural waters. Europium(III) solution detected using cathodic stripping voltammetry after complexation with N -nitroso- -phenylhydroxylamine (cupferron). Optimization parameters allowed us detect nanomolar levels Eu(III) solution. Free measured the Donnan membrane technique wh...

This articles is comprised of two parts: a) an experimental investigation on the behavior of an acrylic gel under DC electric field and b) a physico - mathematical description.a) Gel rods made of poly [acrylamide-co-bisacrylamide] were partially hydrolyzed to different extents at pH 12 by teteramethylethylene diamine. Equlibrium properties of the resulting gels rods (water content,...