Highly seletive potentiometric sensor for determination of phenazopyridine hydrochloride in biological fluids using N,N'-(pyromellitoyl)-bis-L-tyrosine dimethyl ester in ionic liquid matrix.

 A. A. Ensafi, S. Mallakpour; A. R. Allafchian, F. Doozandeh, and F. Tirgiri, Anal Lett. 2010, 43, 2848-2858. Highly seletive potentiometric sensor for determination of phenazopyridine hydrochloride in biological fluids using N,N'-(pyromellitoyl)-bis-L-tyrosine dimethyl ester in ionic liquid matrix.