The present invention belongs to the technical field of chemical detection, and specifically relates to a method for detecting
teprenone isomers.
Teprenone is a digestive
system drug for acid suppression and gastric mucosal protection, and is a mixture of isomers, with the all-trans structure playing the main pharmacodynamic role; therefore, developing a simple and practical method that can effectively separate and detect the two isomers of
teprenone, mono-cis (5Z, 9E, 13E) and all-trans (5E, 9E, 13E), is of great significance for conducting research on the synthesis of all-trans
teprenone and
production quality control. The invention discloses a method for detecting teprenone isomers, and
high performance liquid chromatography is used to detect two isomers of teprenone, the
chromatographic column is a chiral column, CHIRALPAK IB (4.6*250mm, 5μm); the flow rate is 0.7-0.9mL / min; the
column temperature is 20-30℃; the
injection volume is 10-50μL; the
wavelength is 210-220nm; the mobile phase is n-
hexane: n-
butanol:
anhydrous ethanol = (80-75): (15-20): 5; the
elution procedure is
isocratic elution; the
elution times of the two isomers of teprenone, the all-trans and mono-cis, are 8.270min and 9.113min respectively, the separation degree is 2.68, the baseline is stable, and the main peak shape in the
test solution is good. Through methodological
verification, the method can be applied to the separation and
content determination of the two isomers of teprenone, the mono-cis and all-trans, in teprenone bulk drugs or teprenone capsules.