β Scribed by Jose Albaladejo; Angela Molina; Daniel Ruiz-Hernandez
No coin nor oath required. For personal study only.
In this paper we demonstrate that the current-time function of the form I( I) =I0 e"", which cannot be applied in practice to the dropping mercury electrode DME) from the beginnning ofthe drop life, can be applied to this electrode If a previous blank period is used. A general equation for the transition Lime is derived and discussed. In addition, the sphericity ofthe DME has also been taken into account, by adopting the more rigorous expanding-sphere electrode model.
π SIMILAR VOLUMES
The polarographic reduction of erythrosin, the disodium salt of 2',4',5',7'-tetraiodofluorescein, was examined at pH 4.7. Three reduction steps were found. The first step involves two electrons and the reduction of the quinone group as in fluorescein. The second step results from the removal of the
## Abstracl -The rnlr ol'lhc dixh;irgz rexlion <>I'zinc wns at [lx dr~>pping mersur\ electrode i> diminished if the f rxdiu, of the alLJli-melal c':ltions prrsenf in the elc 0 eRect i< exhibited bv tclr;l3lh\lanlmOiiium catilln\. ivhich incre;lses \tith ;he >ize of the nlh\I group. The elcctrl~dc rw