高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (7): 685.

• 研究论文 • 上一篇    下一篇

极谱曲线的背景扣除

田保民1, 陈洪渊2, 肖昭华2   

  1. 1. 四川大学化学系;
    2. 南京大学化学系
  • 收稿日期:1988-09-21 出版日期:1990-07-24 发布日期:1990-07-24
  • 通讯作者: 陈洪渊
  • 基金资助:

    国家自然科学基金

Subtraction of Background Current in Polarographic Curves

Tian Baoming1, Chen Hongyuan2, Xiao Zhaohua2   

  1. 1. Department of Chemistry, Sichuan University, Chengdu;
    2. Department of Chemistry, Nanjing University, Nanjing
  • Received:1988-09-21 Online:1990-07-24 Published:1990-07-24

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摘要： 提出一种借助微机准确、可靠扣除背景的运算方法,方法的拟合函数由背景函数B(E)=a/E+b+cE+dE2和极谱峰函数(极谱峰电流方程与修正的高斯函数结合)加和构成,利用非线性最小二乘法参数估计,即可从实测的极谱曲线求得法拉第峰电流、峰电位和半峰宽度,而毋需空白溶液的数据,此法已应用于交流极谱和示差脉冲极谱。

关键词: 背景扣除, 非线性最小二乘参数估计, 极谱法

Abstract: A accurate, reliable method for correcting the background current in polarographic curves with digital computer has been developed. In this method, the fitting function proposed is composed of the multinomial B(E) =a/E + b + cE + dE2, as a background function, and the polarographic peak function which is obtained by the combination of polarographic peak-current equation with revised Guassian function.By employing the nonlinear least square parameter estimation from the experimental curves, the Faradaic peak currents, peak potential and width of half-peak can be calculated without the need of the data of blank solution. This method has been applied to ACPand DPPfor subtracting the background current with satisfactory results.

Key words: Subtraction of background, Nonlinear least square parameter estimation, Polarography

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