Determination of Copper in Different Ethanolic Matrices Using a Chloropropyl Silica Gel Modified with a Nanostructured Cubic Octa(3-aminopropyl)octasilsesquioxane

Table 5

Recovery of Cu²⁺ with HCl 1.0 mol L⁻¹ after percolation of 100.0 mL of real samples in the column filled with SGAPC (𝑛=3).

Real Samples	[Cu^2+]added	[Cu^2+]	Recovery
	(mg L^−1)	(mg L^−1)	(%)
Sugar cane spirit	0	0.198 ± 0.005	—
	0.050	0.246 ± 0.004	96 ± 8.0
Vodka (38%)	0	0.013 ± 0.002	—
	0.050	0.062 ± 0.003	98 ± 6.0
Ginger brandy	0	0.023 ± 0.007	—
	0.050	0.065 ± 0.006	84 ± 12.0
Ethanol fuel	0	0.036 ± 0.004	—
	0.050	0.087 ± 0.005	102 ± 10.0