基于铝酞菁为载体的亚硝酸根选择性电位传感器的研制
A Nitrite-Selective Potential Sensor Based on an Aluminum-Phthalocyanine Complex as the Ionophore
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摘要: 制备了基于铝酞菁为中性载体对亚硝酸根离子(NO-2)具有独特选择性的一种聚合膜(PVC)电极.该电极对NO-2呈现出反-Hofmeister选择性行为和近Nernst电位响应,其线性范围为1.0×10-1～1.5×10-6mol/L,检测下限为9.5×10-7mol/L,斜率为(-58.3±60.5)mV/decade.该电极作为直接电位法的指示电极,能运用于废水中亚硝酸的测定,结果令人满意.
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关键词:
- 铝酞菁,亚硝酸根,离子选择性电极
Abstract: A poly (vinyl chloride) (PVC) membrane electrode based on an aluminum-phthalocyanine (AIPc) com-plex as a neutral carrier with unique selectivity to nitrite ion (NO-<>,2) was prepared. The proposed electrode was shown to exhibit anti-Hofmeister selectivity behavior and a near-Nernst potential response to NO-2 over a linear 0.5 mV per decade. This electrode was applied, as an indicator electrode in the direct potentiometric method, to the determination of nitrite in wastewater, and satisfactory results were obtained. -
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