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离子选择性电极电位选择性系数的测定——非线性参数估计法
引用本文:田保民,张志蓉,奚治文,张道悌.离子选择性电极电位选择性系数的测定——非线性参数估计法[J].四川大学学报(自然科学版),1989(2).
作者姓名:田保民  张志蓉  奚治文  张道悌
作者单位:四川大学化学系,四川大学化学系化学系,四川大学化学系,四川大学化学系 1983级夜大学毕业生
摘    要:提出了一种离子选择性电极电位选择性系数K_■~■的精确测定方法.用多次标准添加法取得截点活度以上的双离子响应区的实验数据,借助PC—1500计算机进行非线性最小二乘法参数估计,求出K_(?)~(?),E′和S,得到满意的结果.

关 键 词:离子选择性电极电位选择性系数  测定  非线性参数估计

DETERMINATION OF POTENTIOMETRIC SELECTIVITY COEFFICIENT IN ANALYSIS WITH ION-SELECTIVE ELECTRODES-Non-linear parameter estimation with microcomputer
Tian Baoming Zhang Zhirong Xi Zhiwen Zhang Daodi.DETERMINATION OF POTENTIOMETRIC SELECTIVITY COEFFICIENT IN ANALYSIS WITH ION-SELECTIVE ELECTRODES-Non-linear parameter estimation with microcomputer[J].Journal of Sichuan University (Natural Science Edition),1989(2).
Authors:Tian Baoming Zhang Zhirong Xi Zhiwen Zhang Daodi
Institution:Department of Chemistry
Abstract:The application of non-linear parameter estimation to the evaluation of potentiometrit selectivity coefficients(K) of ISEs is proposed. The experimental data in bi-ionic response range are measured by means of multiple known-addition. A PC-l500 pocket computer is employed to calculate the K, E' and S by using non-linear least square algorithm. TheK and K of ORION model 93-35 Br-ISE and model 93-19 K-ISE have beon determinated. The variation coefficients are smaller than 8% and 3% respectively.
Keywords:potentiometric selectivity coefficient of 1SE  determination  non-linear least square algorithm  
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