Fig. 6From: Funerary colors in Pre-classical Maya culture: the red pigment in the 19th tomb of Rio Azul (Peten, Guatemala)Square wave voltammograms for sample 2 in 0.10 M HClaq solution. Potential scan initiated at + 0.85 V in the negative direction; potential step increment 4 mV; square wave amplitude 25 mV; frequency 5 HzBack to article page