Spray Solution Viscosity (cP) Surface Tension (mN/m) Conductivity (µS/cm)
CMC (1.0%) 54 73 167
CMC (0.5%) 19 72 92
CMC (0.1%) 8,3 72 19
ALG (1.0%) 16,6 70 2030
ALG (0.5%) 9,5 71 23
ALG (0.1%) 6,3 70 11
EUD (1.0%) 9,2 40 3000
EUD (0.5%) 8,5 46 2060
EUD (0.1%) 7,5 61 63
AG (1.0%) 6,9 51 95
AG (0.5%) 6,7 57 53
AG (0.1%) 6,3 69 13
CNG (1.0%) 8,6 71 164
CNG (0.5%) 8,6 67 108
CNG (0.1%) 6,5 65 58
CMC=sodium carboxymethyl cellulose; ALG=sodium alginate; EUD=Eudragit RS100; AG=Arabic gum; CNG=cashew nut gum.
Table 1: Viscosity, conductivity and surface tension of spray solutions containing different polymers (encapsulating agents) at three concentration levels ranging from 0.1 to 1.0% (w/w).