Compound [Drug], Taken µg mL-1 [Drug], Found µg mL-1 Percentage Recovery (%) SD* RSD* cyclop.HCl Mo(V)- thiocyanate: 150.0 200.0 250.0 150.0 199.3 249.8 100.0 99.65 99.90 0.24 0.76 0.84 3.60 0.38 1.19 BPB 18.60 28.04 37.38 18.60 28.28 37.38 100.0 100.9 100.0 0.02 0.02 0.01 2.84 2.69 1.07 BCG 9.35 18.60 28.04 9.35 19.08 28.04 100.0 102.5 100.0 0.01 0.03 0.029 1.95 2.87 2.07 BCP 18.60 28.04 37.38 18.60 28.54 39.19 100.0 101.8 104.8 0.013 0.024 0.026 2.25 2.91 2.77 naphaz.HCl TCNQ 60.00 100.0 150.0 61.75 100.0 149.3 102.9 100.0 99.50 0.05 0.06 0.01 0.08 0.06 1. 90 * Mean values for five experiments carried out on four days.

Table 3: Between–day precision of the determination of CPH and NPZ drugs by the proposed methods.