Design of countercurrent separation of bufadienolides from waste toad eggs by quantum mechanism-enhanced nuclear...

While artificial toad breeding generates vast quantities of bufadienolide-rich waste eggs, their exploitation is hindered by high lipid content, which typically leads to column clogging and poor solubility in conventional separation frameworks. In this study, a rational design for the countercurrent chromatography (CCC) separation of bufadienolides from waste toad eggs was developed using quantum mechanism-enhanced NMR. Considering that signal overlapping and baseline drifting of complex natural mixtures often impede accurate CCC solvent system design, quantum mechanical spin analysis was employed to deconvolve individual spectral information from the mixture. This allowed for precise proton signal characterization and quantitation, which served as the foundation for calculating and designing the optimal CCC separation parameters. Implementing this designed approach led to the efficient, high-purity separation of target bufadienolides. It demonstrates that quantum mechanism-enhanced NMR is a promising strategy for the rational design of CCC separation processes to facilitate the high-value valorization of complex natural waste.