Square wave volt-coulometry

FOR a long time, people pay particular attention to the way to decrease the charging current and improve the Faraday current in the modern square wave voltammetry (SWV), but the effects of random noise on analytical result are ignored. However, it is impossible to avoid the random noise absolutely in the measuring process. Especially, when the concentration is low, the signal is affected seriously by the random noise and it is difficult to get a lower detection limit. So it is necessary to know how to decrease the random noise in order to get a lower detection limit, while trying to find out how to decrease the charging current. A new sampling technique using the square wave potential scan is proposed to smooth the random noise and decrease the detection limit in SWV. The foundation of this new method comes from one of the laws of mathematical statistics; that is, the positive and negative probable errors in a group of detected data exist equally and then the sum of all the errors is ze-

吸附方波伏库仑法研究 Ⅱ络合吸附体系

对络合吸附体系分别推导了前行化学反应平衡常数Ｋ１和Ｋ１两种情况的方波伏库仑法的电量方程及作了实验验证，获得判别这两种络合吸附体系的理论依据。讨论了各种因素对伏库仑曲线的影响，并由实验比较了方波伏库仑法和方波伏安法的检测限。

方波伏库仑法

方波伏库仑法(Square wsve Volt—Coulometry,简写SWVC)是在现代方波伏安法(Square—Wave Voltametry,SWV)的基础上发展起来的,本文简要介绍其原理以及在具体体系中的运用。