Objective To establish a HPLC method for the determination of UGT substrates in isolated rat liver microsomes.Methods P-nitrophenol and acetaminophen were chosen as UGT substrates,with phenacetin and caffeine as internal standards,respectively.The determination was performed on a Welchrom C18column,with mobile phase of p-nitrophenol was acetonitrile-0.01mol/L ammonium acetate(pH 5.00=35∶65,and for acetaminophen was acetonitrile-water=14∶86.The flow rate was 1 mL/min.Detection wavelength of pnitrophenol and ...