基于分光光度法痕量重金属传感模型和影响因素的研究

Study on the influence factors of the concentration of heavy metals by spectrophotometry

对近海和河流水中含量较高、污染较重的可溶态重金属镉(Cd^(2+))、铜(Cu^(2+)),锌(Zn^(2+))、镍(Ni^(2+))等的同时测量方法进行研究,研究四种参量各自的特征谱与吸光度的特点及四种参量互相影响时其浓度与特征波长总吸光度间的数学模型;重点研究四种离子同时传感测量时,不同pH值、温度、时间、显色剂量等因素对金属离子浓度测量值的影响,并通过实验给出影响规律.

This paper analyzes the simultaneous measurement method for the higher content soluble heavy metal elements of Cd^（2＋）, Cu^（2＋）, Zn^（2＋）, and Ni^（2＋）which are heavy pollution in coastal and river water, demonstrates the properties of corresponding characteristic spectrum and absorbance of the four elements, establishes the mathematical model to function the concentration and total absorbance at the characteristic wavelength when the four elements dependent each other. We focus on effects of different situation of p H, temperature, time chromogenic dose on the metal ion concentration simultaneous measurement and summarize the experimental law.