Abstract
Triphenylsulfonium chloride, (C6H5)3SCl, is synthesized and its polarographic behaviors have been investigated in this experiment. The reagent showed one-step reducing wave having a maximum wave at about -1.5v (vs. S. C. E. ), but it turned a two-step reducing wave by the addition of an maximum suppressor. The authors explained the mechanism of reaction at the electrode surface as fcllows:
Electrode reaction in the first wave (C6H5)3SCl +2e→(C6H5)2S+C6H5Cl
Electrode reaction at the second wave (C6H5)2S +2e+2H+→S+2C6H6
The reagent is tested for precipitation reaction of several metal complex ions, among which Bi3+ and Hg2+ are especially sensitive and give a complete precipitation polarographically. Successful result is shown for amperometric titration of Bi3+ and Hg2+ and quantitative determination can be carried out within the error of ±1%
