The high levels of copper in Brazilian spirits is a problem of prominent importance, taking into account the relevance of this metal. This work investigates the efficiency of two solids: silica organofunctionalized with thimethoxysil(propil) ethylenediamine (Si-Dia) and silica-titania modified with the same organofunctionaling agent (Si-Ti-Dia) as copper sequestrating agents in a Brazilian spirit obtained from sugar cane. It was verified that the matrices Si-Dia and Si-Ti-Dia are very good sequiestrating agents, reducing the concentrations of Cu, Zn and Fe in the studied spirit sample in 82, 83 and 64% and 88, 31 and 22%, respectively at 25 ± 1.0°C and pH 4.0.
alcoholic beverage; copper; adsorption; modified silica; atomic absorption spectometry
