Abstract.
Electrochemical identification of natural insoluble curcuma and safflower dyes in microsamples usable for microchemical examination of works of art and archaeological artifacts via solid state voltammetry is described. Upon attachment to paraffin-impregnated graphite electrodes in contact with aqueous acetate and phosphate buffers, curcuma and safflower yield well-defined square wave voltammetric responses with well-defined oxidation peaks in the potential region of +0.65–+0.25 V vs. AgCl/Ag allowing for unambiguous identification of such dyes in microsamples.
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Doménech-Carbó, A., Doménech-Carbó, T., Saurí-Peris, C. et al. Identification of Curcuma and Safflower Dyes by Voltammetry of Microparticles Using Paraffin-Impregnated Graphite Electrodes. Microchim Acta 152, 75–84 (2005). https://doi.org/10.1007/s00604-005-0410-z
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DOI: https://doi.org/10.1007/s00604-005-0410-z