Adsorptive Cathodic Stripping Voltammetric Studies of Emodin

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Journal Title, Volume, Page: 
An-Najah University Journal for Research, Natural Sciences, Volume 13, Issue 1
Year of Publication: 
1999
Authors: 
Mohammad A. Hannoun
Faculty of Pharmacy, An- Najah National University, Nablus, Palestine
Current Affiliation: 
Department of Pharmacy, Faculty of Medicine & Health Sciences, An-Najah National University, Nablus, Palestine
Preferred Abstract (Original): 

A differential pulse cathodic stripping voltammetric (DP-CSV) method for determination of emodin in Britton- Robinson buffer (pH2) at a hanging mercury drop electrode (HMIDE) is described. The method is based on measuring the reductive peak height at —0.25V vs. Ag/AgCl reference electrode. The linear relationship between the peak current and emodin concentration allowed the voltarnmetric determination of emodin over a wide concentration range 1.0 X 10-2 —2.5 X10-6 M, with a relative standard deviation of 3.3% (10 determinations at 1 X 10-2 M). Adsorption of emodin at HMDE enabled a detection limit of 2X10-1°M after 3 min accumulation at 0.0V. The applicability of the suggested method was found to be suitable for the determination of emodin in roots, stems and leaves of Rumex cyprius plant.

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