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PAR在0.28mol·dm~(-3)氢氧化钾—0.20mol·dm~(-3)氯化钾溶液中有一清晰的极谱波,峰电位在-0.66伏,浓度在0至4.00×10~(-5)mol·dm~(-3)间和峰电流成直线关系,从而提出了PAR的导数示波极谱测定法。本文还研究了PAR的极谱性质、反应机理和电极产物,表明PAR的极谱波为一吸附波,电极反应系PAR分子中-N=N-键在电极上还原所致。
PAR has a clear polarographic wave in 0.28 mol · dm -3 potassium hydroxide-0.20 mol · dm -3 potassium chloride solution with a peak potential of -0.66 V and a concentration of 0 to 4.00 × 10 ~ (-5) mol · dm ~ (-3) and the peak current into a linear relationship, thus the PAR derivative oscillopolarographic determination. In this paper, the polarographic properties of PAR, the reaction mechanism and the electrode products were also studied. It is shown that the polarographic wave of PAR is an adsorptive wave. The electrode reaction is due to the reduction of -N = N-bond in the PAR molecule on the electrode.