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本文系统的研究了Cu~(2+)和吡啶、水杨酸形成的多元络合物,在不同酸度条件下的组成及稳定性。本实验条件下,该络合物的组成为Cu~(2+):PY:Sal~(2-)=1∶2∶1。本文是在一定的底液条件下,将试液中Cu~(2+)富集在玻炭电极上,然后在一定电位下,测定溶出峰,若有吡啶存在,铜的溶出峰电流会降低,吡啶浓度在1×10~(-6)～1×10~(-11)M范围内,吡啶浓度与峰电流降低值有线性关系。本文建立了一个灵敏、准确测定地面水和空气中痕量吡啶的新方法。
In this paper, we have systematically studied the composition and stability of multicomponent complexes formed by Cu 2+ and pyridine and salicylic acid under different acidity conditions. Under the experimental conditions, the composition of the complex is Cu ~ (2 +): PY: Sal ~ (2 -) = 1: 2: 1. In this paper, under the conditions of a certain bottom liquid, the Cu 2+ in the test solution is enriched in the glassy carbon electrode, and then the dissolution peak is measured under a certain potential. If there is pyridine, the dissolution peak current of copper will decrease , The concentration of pyridine was in the range of 1 × 10 -6 ~ 1 × 10 ~ (-11) M, and the linear relationship between the concentration of pyridine and the decrease of peak current was found. In this paper, a new method for sensitive and accurate determination of trace pyridine in surface water and air was established.