Abstract：4-（2-pyridylazo）-resorcinal （PAR） produced two distinct redution waves in the medium of 0.28 mol·dm-3 KOH and 0.20 mol·dm-3 KCI solution. The peak potentials are obtained at-0.66V and -0.74V, and the first wave is used for quantitative analysis. The
1987, Vol. 11 