Spiked mefenamic acid 200 ng/mL 500 ng/mL 1000 ng/mL Recovery percent in plasma (mean ± S.D.) 64.5 ± 2.3 84.7 ± 1.8 75 ± 1.5 Recovery percent in urine (mean ± S.D.) 84.2 ± 1.8 77.65 ± 1.6 75.5 ± 1.35

Table 2: Percent recovery for electrochemical determination of mefenamic acid in plasma and human urine (n=3) by MWCNTs-G/Ag electrode.