Indirect measurement of brucine by adsorptive stripping voltammetry at mercury electrode |
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Authors: | Li M Hu N Lin S |
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Institution: | Department of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China. |
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Abstract: | After reaction with nitric acid, brucine can be transformed into cacotheline, and then measured indirectly by adsorptive stripping voltammetry. This method is based on the adsorptive accumulation of cacotheline at a hanging mercury drop electrode, followed by cathodic linear sweep voltammetry. The cathodic peak potential is about -0.35 V (vs. saturated Ag AgCl ). The detection limit of 2.0 x 10(-9) M is obtained under optimized conditions. The electrochemical behaviour of cacotheline and the mechanism of the electrode reactions are discussed. |
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