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极谱分析通常要求电解液必须导电良好,支持电解质浓度一般要求高于0.05—0.1M。如用盐桥连接极谱分析用的参比电极和带有指示电极的电解池则要求盐桥导电必须良好。否则,由于电解池内阻过高,导电不良,iR电位降增大,造成极谱波形倾斜、失真甚至不出波形。极谱溶出法对溶液导电性的要求程度更高。如溶液内阻增大,不仅使溶出波变形失真,而且明显降低波峰。对于痕量分析,支持电解质和盐桥浓度愈高,愈易引进杂质,使空白增高,从而降低了检
Polarographic analysis usually requires that the electrolyte must be well-conducting, and that the supporting electrolyte concentration is generally required to be higher than 0.05-0.1M. If the salt bridge is connected to the reference electrode for polarographic analysis and the cell with the indicator electrode, the salt bridge must be electrically conductive. Otherwise, as the cell resistance is too high, poor conductivity, iR potential increases, resulting in polarographic waveform tilt, distortion or not out of the waveform. Polarographic dissolution method of the conductivity of the solution to a higher degree. If the solution resistance increases, not only distortion of dissolution wave distortion, but also significantly reduce the peak. For trace analysis, the higher the concentration of the supporting electrolyte and salt bridge, the easier it is to introduce impurities to increase the blank, thereby reducing the