Fang Xia

A HPLC method was developed to measure trimethylamine in fish oil supplements, to determine if the level of this compound affects product quality attributes such as rancidity.

A fast ultrahigh-pressure liquid chromatography (UHPLC) method, with low solvent consumption, is described for the determination of coenzyme Q10 in a variety of complex formulations. This method exhibits good linearity, reproducibility, accuracy, recovery, and specificity, while resulting in an acceptable limit of detection (LOD) and limit of quantification (LOQ).

UltraPerformance LC (UPLC) has been widely accepted by chromatographers because of improvements over HPLC in the sensitivity, resolution and speed of separations. As scientists begin to use this technology for impurity and metabolite profiling, they will need to transfer the methods to preparative LC to isolate and purify their compounds for further research. Therefore, it is necessary to systematically transfer UPLC assays not only to HPLC, but, more importantly, to preparative chromatography. In this application, we provide information on how to scale a UPLC impurity/degradant separation to a preparative LC separation.