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本文介绍了采用管式金电极为流通池,差分脉冲阳极溶出伏安法测定痕量铜的连续分析方法。管式电极流通池的制作和应用很方便,有体积微小、测量信号稳定、重现性好、灵敏度高等优点。在硫酸介质中,电解10min,铜的检测下限可达4×10~(-10)g/ml。在2×10~(-9)—1×10~(-7)g/ml范围内溶出峰电流和铜浓度有良好的线性关系。本文阐明和验证了理论方程式,分析了实际水样。
This paper presents a continuous analysis method for the determination of trace copper by differential pulse anodic stripping voltammetry using a tubular gold electrode as a flow cell. Tubular electrode flow cell production and application is very convenient, small size, measurement signal stability, reproducibility, high sensitivity and so on. In sulfuric acid medium, electrolysis 10min, copper detection limit of up to 4 × 10 ~ (-10) g / ml. There was a good linear relationship between the peak current and copper concentration in the range of 2 × 10 -9 -9 × -1 (-7) g / ml. This article illustrates and validates the theoretical equations and analyzes the actual water samples.