Two non _ enantiomers and trace impurities in cyhalothrin were identified by HPLC-MS with collision _ induced dissociation(CID) technique.The isomers can be completely separated on an ODS-C18 column.

• 用高效液相色谱-质谱联用技术研究了三氟氯氰菊酯农药的杂质及含量,并用源内碰撞诱导解离(CID)技术鉴别了所存在的微量杂质。