Direct optical resolution of chiral pesticides by HPLC on emamectin CSP under normal phase conditions

作者:Bi CL; Zhao EC; Liu Y; Qiu J; Zhou ZQ*
来源:Journal of Liquid Chromatography & Related Technologies, 2006, 29(11): 1601-1607.
DOI:10.1080/10826070600678324

摘要

A chiral stationary phase (CSP) was prepared by bonding emamectin onto unmodified spherical gel. Normal-phase high performance liquid chromatography (HPLC) methods for the resolution of three chiral triazole pesticides, triadimefon, difenoconazole, and propiconazol, on the CSP were developed. Several operating parameters, such as mobile phase composition, column temperature, and flow rate were studied for the optimization of the resolution. Better separations were achieved using 5% isopropanol for triadimefon, 20% iso-propanol for difenoconazole, and 5% isopropanol for propiconazol as modifiers, in n-hexane at 10 degrees C with the selectivity factors (a) of 1.29, 1.29, and 1.48, respectively.