【摘要】 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^-5mol·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。更多还原

【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 linear relationship exists bettween the peak current and concentration in the range from 0 to 4.00×10^-5 mol·dm^-3. It can be used for determination of PAR. The polarographic properties, reaction mechanism and electrode product have been studied. It shows that the polarographic wave is an adsorpiton one.The electrode reaction is due to the reduction of -N=N- in PAR.更多还原