% Assay   Entacapone Levodopa Carbidopa Sample-1 98.8 100.9 95.6 Sample-2 99.4 101.0 96.3 Sample-3 99.3 101.2 95.5 Sample-4 98.8 101.1 95.7 Sample-5 99.0 101.4 96.4 Sample-6 98.5 101.3 96.1 Mean 98.96 101.15 95.9 % RSD 0.06 0.03 0.03

Table 8: Precision results of the proposed method.