Table 1 Concentration of free Ca²⁺ ion in brine solution in the absence and presence of different concentrations of polymer 2 and their percent of inhibition (C_b = 1221.22 ppm and C_a = 800.8 ppm).

From: Assessment of self-doped poly (5-nitro-2-orthanilic acid) as a scaling inhibitor to control the precipitation of CaCO₃ and CaSO₄ in solution