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

Table 1

Bands assigned in the FTIR spectrum for SGAPC.

Functional Group	Wavenumber (cm^−1)	Type of vibration*
Si-C	1250	𝜈𝑠
Si-O-Si	1110 at 1030	𝜈𝑠
N-H	1650 at 1580	𝛿𝑠
N-H	3400 at 3500	𝜈𝑠

* 𝜈_𝑠 symmetric stretching; 𝛿_𝑠 angular deformation.