中文摘要：

本文用紫外可见分光光度法,以四苯基卟啉为显色剂测定二价锌与二价镉的含量。用控制变量法对最大吸收波长（λmax）、显色剂用量、p H值、显色温度、显色时间等实验条件进行了筛选。Zn~（2＋）—TPP反应体系的最大吸收波长为421.1nm,Zn~（2＋）的含量为0.04~0.28μg/m L时呈良好线性关系,直线回归方程为：A=0.016 71＋0.316 57X,相关系数为r=0.999 2;Cd~（2＋）—TPP反应体系的最大吸收波长为419nm,Cd~（2＋）的含量为0.014~0.08μg/m L时呈良好线性关系,直线回归方程为：A=0.051 24＋0.310 1X,相关系数为r=0.999 54。

英文摘要：

The method of UV visible spectrophotometry was used to determine the content of zinc ions and cadmium ions,and the tetraphenylporphyrin（ TPP） was used as a chromogenic reagent in this paper. To study experimental conditions such as variablesmaximum absorption wavelength、the dose chromogenic reagent 、p H 、temperature 、measuring time and so on by controlling variable method. The maximum absorption wavelength of the Zn~（2＋） —TPP reaction system is 421. 1nm,and it showed a good linear relationship when the content of Zn~（2＋） is between 0. 04μg / m L and 0. 28μg / m L. The linear equation is A = 0. 01671 ＋ 0. 31657 X,and the correlation coefficient is 0. 9992; While the maximum absorption wavelength of the Cd~（2＋） and TPP reaction system is 419 nm,when the content of Cd~（2＋） is between 0. 014μg / m L and 0. 08μg / m L,the absorption intensity is linear with respect to the content of Cd~（2＋） . The linear equation is A = 0. 05124 ＋ 0. 3101 X,and the correlation coefficient is 0. 999 54.