title: Indirect measurement of brucine by adsorptive stripping voltammetry at mercury electrode.
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.
authors.affiliation: Department of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China.
authors.forename: M
authors.initials: M
authors.lastname: Li
authors.forename: N
authors.initials: N
authors.lastname: Hu
authors.forename: S
authors.initials: S
authors.lastname: Lin