Voltammetric Determination of Indigo Carmine and Amaranth on a Silver-Based Mercury Film Electrode
- 1 May 1992
- journal article
- research article
- Published by Taylor & Francis in Analytical Letters
- Vol. 25 (5) , 899-909
- https://doi.org/10.1080/00032719208020044
Abstract
The voltammetric behavior of indigo carmine and amaranth on silver-based mercury film electrodes was studied. At pH 4, reduction current peaks were observed at potential −0.11 V (indigo carmine) and −0.24 V (amaranth), respectively. The system showed a linear response to both of the food colorants in a concentration range of 0 to 100 ng/ml. Detected at different reduction potentials, indigo carmine and amaranth could be determined separately without interfering with each other. This method demonstrated a better reproducibility and longer life time than the existing techniques.Keywords
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