Compounds Slope Sucrose syrup Oral Solution Standards Spiked samples RSD% Standards Spiked samples RSD% Coumarin 83.384 82.582 0.68 83.384 83.597 0.18 o-coumaric acid 94.630 96.996 1.75 94.630 94.812 0.14 Syringaldehyde 7.320 7.424 1.00 7.320 7.297 0.22 Dihydrocoumarin 15.987 15.244 3.36 15.987 16.063 0.34

Table 2: Comparative slope of standards and spiked samples in different matrices for selectivity study.