AIM: To establish a method for determinate of the inhibitory activity of angiotensin-converting enzyme inhibitor captopril by high performance capillary electrophoresis. METHODS: The characteristic absorptive wavelength of hippuric acid determined by ultraviolet spectrophotometer is 228 nm. The method employed a melted capillary column, 50 mmol.L-1 phosphoric acid (pH 8.3) buffer solution, inject pressure 4.8 kPa, inject time 3 s, separation voltage 20 kV and detection wavelength 228 nm. RESULTS: The reactant and resultant was separated completed within 7 min. IC50 of captopril was 0.019 mumol.L-1. Captopril is a competitive inhibitor, which was proved by enzyme reaction dynamics. CONCLUSION: The method was shown to be accurate, simple and rapid and can be used for determination of the inhibitory activity of captopril.
AIM: To establish a method for determinate of the inhibitory activity of angiotensin-converting enzyme inhibitor captopril by high performance capillary electrophoresis. METHODS: The characteristic absorptive wavelength of hippuric acid determined by ultraviolet spectrophotometer is 228 nm. The method employed a melted capillary column, 50 mmol.L-1 phosphoric acid (pH 8.3) buffer solution, inject pressure 4.8 kPa, inject time 3 s, separation voltage 20 kV and detection wavelength 228 nm. RESULTS: The reactant and resultant was separated completed within 7 min. IC50 of captopril was 0.019 mumol.L-1. Captopril is a competitive inhibitor, which was proved by enzyme reaction dynamics. CONCLUSION: The method was shown to be accurate, simple and rapid and can be used for determination of the inhibitory activity of captopril.
Authors: Y Yuan; A J Tang; A B Castoreno; S-Y Kuo; Q Wang; P Kuballa; R Xavier; A F Shamji; S L Schreiber; B K Wagner Journal: Cell Death Dis Date: 2013-06-27 Impact factor: 8.469