Enantioselective determination of triazole fungice tetraconazole by chiral high-performance liquid chromatography and its application to pharmacokinetic study in cucumber, muskmelon, and soils
作者:Jing Li、Fengshou Dong、Jun Xu、Xingang Liu、Yuanbo Li、Weili Shan、Yongquan Zheng
DOI:10.1002/chir.21997
日期:2012.4
successfully applied to the study of enantioselective degradation of rac‐tetraconazole in cucumber, muskmelon, and soils. The results showed that the degradation of two enantiomers of tetraconazole followed first‐order kinetics and significantly stereoselective behavior was observed in cucumber, muskmelon, and Beijing soil. The preferential absorption and degradation of (−)‐S‐tetraconzole resulted in an enrichment
开发了一种简单的具有二极管阵列检测器的手性高效液相色谱方法,并已验证可用于立体选择性测定黄瓜,香瓜和土壤中的四康唑对映体。良好的分离在20实现℃下使用纤维素三(4-甲基苯甲酸酯)作为手性固定相的混合物,Ñ以0.8毫升/分钟的流速-己烷和乙醇(90:10)作为流动相。该测定方法在一定浓度范围(0.5–50μg/ ml)内呈线性,两种对映体的平均回收率均在85%以上。植物和土壤样品中两种对映体的检出限分别为0.06和0.12μg/ g。将该方法成功地应用于rac的对映选择性降解研究。黄瓜,甜瓜和土壤中的四康唑。结果表明,在黄瓜,甜瓜和北京土壤中,四康唑的两种对映体的降解遵循一级动力学,并且具有明显的立体选择性。(-)- S-四康唑的优先吸收和降解导致植物样品中的(+)- R-四康唑残基富集,而(+)- R-四康唑在北京土壤中显示出更快的降解和立体选择性可能是由微生物引起的。在黑龙江土壤中未观察