Direct enantioseparation of nitrogen-heterocyclic pesticides on amylose-tris-(5-chloro-2-methylphenylcarbamate) by reversed-phase high-performance liquid chromatography
文献类型: 外文期刊
第一作者: Yang, Wenwen
作者: Yang, Wenwen;Qiu, Jing;Chen, Tianjin;Yang, Shuming;Yang, Wenwen;Qiu, Jing;Chen, Tianjin;Yang, Shuming;Yang, Wenwen;Hou, Shicong
作者机构:
关键词: amylose;chiral pesticide;chiral stationary phase;elution order;enantioseparation;HPLC
期刊名称:CHIRALITY ( 影响因子:2.437; 五年影响因子:2.204 )
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收录情况: SCI
摘要: In this study, 11 nitrogen-heterocyclic pesticides were stereoselectively separated on amylose-tris-(5-chloro-2-methylphenylcarbamate) chiral stationary phase, using reversed-phase high-performance liquid chromatography with diode array detector and optical rotation detector at 426 nm. The effects of mobile phase composition and column temperature (5-40 °C) on separation were investigated. When acetonitrile and water were used as mobile phase, satisfactory separations were obtained on amylose-tris-(5-chloro-2- methylphenylcarbamate) for four pesticides with elution orders of (+)/(-)-simeconazole (1), (-)/(+)-nuarimol (3), (-)/(+)-carfentrazone-ethyl (4), and (-)/(+)/(-)/(+)-bromuconazole (9) and part separations for three with elution orders of (-)/(+)-famoxadone (6), (+)/(-)-fenbuconazole (10), and (-)/(+)-triapenthenol (11). Only two chromatographic peaks on diode array detector were obtained for diclobutrazol (2), cyproconazole (5), etaconazole (7), and metconazole (8), although they should have four stereoisomers in theory because of presences of two chiral centers in molecules. The stereoisomeric optical signals of all pesticides did not reverse with temperature changes but would reverse with different solvent types for some pesticides. These results will be useful to prepare and analyze individual enantiomers of chiral pesticides. Chirality 24:1031-1036, 2012.
分类号: O641
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