Polymeric Composite Materials for the Detection of Barium Ions in Aqueous Solutions

Table 3

Wavelength of the absorbance maximum for NCM with OMS in the PVB film at various concentrations Ba(ClO₄)₂.

Ва^2+ concentration mol/L	λ0, nm, (before impregnation)	λ1, nm, (after impregnation)	Relative shift Δλ, nm
^-3			+16
^-4			+15
^-5			+14
^-6			+12