Parameters Butamirate citrate Benzoic acid Linearity slope 12392 23056 intercept -24.733 979.54 r 0.9975 0.9997 Range (mg/ml) 0.28 - 0.84 0.23 - 0.68 Repeatability RSD% 0.307 0.191 Accuracy mean recovery 100.248 99.013 RSD% 0.928 0.537

Table 1: Some of the validation parameters for butamirate citrate/benzoic acid assay.