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Effect of surface-active compounds on the stripping voltammetric response of bismuth film electrodes

机译：表面活性剂对铋膜电极溶出伏安响应的影响

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The influence of model surface-active macromolecules on the stripping voltammetric response of bismuth film electrodes was evaluated. Gelatin, albumin, humic acid, and Triton X-100 were used as representative surfactants, while lead and cadmium were employed as test metal ions. The adsorption of these surfactants onto the bismuth electrode caused a gradual decrease of the stripping peaks, The faster and larger suppressions observed at the bismuth electrode (compared to the mercury one) in the presence of albumin and Triton X-100 reflect differences in the adsorption kinetics and equilibrium of these surfactants at these electrodes. The surfactant interference at bismuth stripping electrodes can be circumvented using a permselective/protective Nafion coating. The effective resistance to surfactant effects makes the Nafion-coated bismuth electrode very attractive for practical stripping applications. A Nafion-modified stripping electrode is applied for measurements at large sample-instrument distances. [References: 12]
机译：评估了模型表面活性大分子对铋膜电极溶出伏安法响应的影响。明胶，白蛋白，腐殖酸和Triton X-100被用作代表性的表面活性剂，而铅和镉被用作测试金属离子。这些表面活性剂在铋电极上的吸附导致溶出峰的逐渐减少。在存在白蛋白和Triton X-100的情况下，在铋电极上观察到的更快和更大的抑制作用（与汞相比）更能反映出吸附的差异这些表面活性剂在这些电极上的动力学和平衡。可以使用全选择性/保护性Nafion涂层来避免铋剥离电极上的表面活性剂干扰。有效的表面活性剂抗性使Nafion涂层铋电极在实际剥离应用中非常有吸引力。使用Nafion修饰的溶出电极进行大样品仪器距离的测量。 [参考：12]

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