摘要
在ｐＨ９．０的ＮＨ３－ＮＨ４Ｃｌ溶液中，Ｃｏ（Ⅱ）与丁二酮肟在－１．２０Ｖ产生一灵敏的配合吸附波，在１×１０－８～１×１０－５ｍｏｌ／Ｌ范围内，波高与钴浓度有线性关系，检测限可达１×１０－９ｍｏｌ／Ｌ。本实验测定了轻质油品脱臭催化剂中的钴含量和催化剂活性物的纯度，与原子吸收分光光度法对照，结果一致。
In a buffer solution of 0.01 mol/L NH3-NH4Cl(pH9.0),a sensitive derivative wave of cobalt-dimethylglyoxime(DMG) system was observed at-1.20V(vs.SCE) with single sweep oscillopolarography.The electrochemical behavior of the Co-DMG complex is studied by linear sweep voltammetry and cyclic votlammetry.The adsorptive catalytic property of this system has been proved.The electrode reaction of cobalt complex at mercury electrode was a complete irreversible process.The cobalt content and the purity of active components in the catalyst for light oil deodorization were determined by polarography.The linear range of determination is 1×10-8～10-5 mol/L,while the detection limit is 1×10-9 mol/L.The results agree well with atomic absorption spectropotometry.
出处
《分析测试学报》
CAS
CSCD
1996年第5期60-64,共5页
Journal of Instrumental Analysis
