Separation and quantitation of bile acids using an isocratic solvent system for high performance liquid chromatography coupled to an evaporative light scattering detector.

We developed a quantitative method for the analysis of bile acids using a high performance liquid chromatograph coupled to an evaporative light scattering detector. An isocratic solvent system was used to resolve in a single run conjugated and unconjugated bile acid species relevant in human and rodent physiology. The detection of various bile acids was linear over a range of 0.08 to 10 nmol of injected molecules. The developed system is a convenient and cost-effective method for the routine analysis of a wide variety of bile acids.