A Dynamic Electrode for the Selective Determination of Aluminum in Solution

1,1’-[benzene-1,4-diyldimethylylidene]bis(3-phenylurea)) was synthesized and tested for the fabrication of aluminum selective membrane electrode. The membrane electrode with dimethyl phthalate (DMP) as plasticizer works satisfactorily in the linear concentration range of 1.3×10-6 to 1.0×10-1 M with best optimized composition of DMP: PVC: ionophore: NaTPB of 60:35:3:2 (%, w/w). The membrane electrode has a fast response time (5 s) and wide pH range (2.5–8.5). The selectivity coefficients were calculated with fixed interference method. The membrane sensor was also used as an indicator electrode for the titration of Al(III) with EDTA and Na3PO4