Flow-injection electrogenerated chemiluminescence detection of hydrazine based on its in-situ electrochemical modification at a pre-anodized platinum electrode |
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Authors: | Zheng Xingwang Zhang Zhujun Guo Zhihui Wang Qi |
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Institution: | College of Chemistry and Materials Science, Shaanxi Normal University, Xi'an, PR China. zhengxw@snnu.edu.cn |
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Abstract: | In this paper. it was found that the enhancing effect of hydrazine on the weak electrogenerated chemiluminescence (ECL) signal of the electrooxidation of luminol at a pre-anodized platinum electrode was stronger than that of hydrazine at a bare platinum electrode. Based on this finding and the combination of this finding with a flow-injection technique, a novel, sensitive and selective ECL method for hydrazine was developed. Under the optimum experimental conditions, the relative ECL intensity was linear with hydrazine concentration over the range 2.0 x 10(-8) - 5.0 x 10(-5) mol L(-1), with a detection limit of 6.0 x 10(-9) mol L(-1). |
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