Polarographic Determination of Stannous (tin) with Acrylic Acid

Department of Chemistry, Punjabi University, Patiala-147 002 Manuscript received 11 May 1981, revised 26 February 1982, accepted 21,July 1982 Stannous (tin) produces a well defined diffusion controlled, irreversible reduction wave in acrylic acid which has been employed for its determination. The limiting current increased with the increase in the Sn(II) concentration. The possibility of determining mg quantities of Sn(II) in solution by this method has been examined. The variation in acrylic acid concentration has no effect on the shape of the polarogram. However, the value of half wave potential shifted to more negative potential with increase in acrylic acid conc. and the \(p\)H of solution. The value of half wave potential and diffusion current constant came out to be — 0.476 S.C.E. and 3.02 vs, respectively in 0.1 M acrylic acid. A 10 fold ratio of In(III), Cu(II), Sn(IV), Pt(IV), Te(VI), Co(H), Ni(II), Zn(II), Mn(II), AI(III) and Fe(III) does not interfere. However, Pb(II) and TI(I) interfere but their relatively lower amounts could be tolerated. The method is one of the most selective