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In the present research work we concentrated on the structure elucidation of new heteropolyacid salts: Zirconium Antimonoarsanotungstate Zr[SbAsW] salt synthesized at variable pH using sol-gel route. Instrumental technique, FTIR was used to assign the structural aspects to the compound. Physical characterization involve determination of ion exchange capacity and maximum value for this parameter is 0.40mg/eq. Distribution coefficient values showed that the synthesized compound is preferentially selective for Pb2+ ion. Membrane composition, where ZrSbAsW was 40% showed linearity in the range of 1.0×10-4 M to 1.0×10-1 M with slope of 20.0 mV/decade taking 10-1 M as internal solution. Above instrumental and analytical studies gave a picture of Pb2+ selective electro-active characteristics to the synthesized compound. Keywords: Zirconium Antimonoarsanotungstate, synthesis, Kd values, ion exchange capacity, ZrSbAsW