Chemical   Spiked(ng/ml) Precision
Mean(ng/ml) SD RSD(%) REa(%)
Ferulic Acid


2.47 0.38 15.3 -1.43
Ferulic acid at the concentration of 2.5 ng/ml in rat plasma was prepared and then injected into UPLC-MS/MS to determine the precision. Mean of the concentration (ng/ml) of ferulic acid in rat plasma, SD, RSD (%) and RE (%) was calculated, n = 6. a refers to relative errors.
Table 2: Precision and accuracy at the LOQ of 2.5 ng/ml for ferulic acid in rat plasma determined by UPLC-MS/MS method