Table 1

Concentration of diclofenac, tolbutamide, phenytoin, and celecoxib in the reaction mixture in the presence of 0, 1, 3, and 5% acetonitrile

Acetonitrile ConcentrationSubstrate Concentration
DiclofenacTolbutamidePhenytoinCelecoxib
% μM
019.9  ± 0.1992  ± 2077.3  ± 1.41-a 10.8  ± 0.81-a
119.5  ± 0.41016  ± 1677.3  ± 2.11-a 12.8  ± 0.31-a
320.0  ± 0.31012  ± 2473.6  ± 5.11-a 13.8  ± 0.1
520.2  ± 0.21013  ± 1699.8  ± 0.515.6  ± 0.6

The data are expressed as mean ± S.D. from three determinations.

  • 1-a Significantly different from the concentration in the reference solution (P < .05).