摘要
采用液相色谱-质谱-质谱法对坯布中残留农药2,4-滴和2,4-滴丙酸的检测进行研究.检测样品经甲醇提取,吹干后用流动相溶解,质谱-质谱采用电喷雾负离子化方式电离,多离子反应监测方式检测.优化质谱-质谱参数和液相色谱条件,最低检测限为0.005mg/kg,在0.02～0.5mg/kg范围内平均回收率为85.2%～100.9%,相对标准偏差为2.78%～13.8%.
Liquid chromatography-tandem mass spectrometry （LC-MS-MS） is used as a new method for the determination of the residue of 2,4-Dichlorophenoxyacetic acid （2,4-D） and 2-（2,4-dichlorophenoxy） Propionic acid （2,4-DP） in grey cloth. The Samples are extracted by methanol, dried and diluted by the mobile phase. The electrospray ionization （ESI） negative mode detected by Multiple Reaction Monitoring （MRM） is used for MS-MS. The optimization of analytical conditions of HPLC and analytical parameters of MS-MS are performed. The detection limit by this method is 0.005mg/ kg. The average recoveries are 85.2% ～ 100.9% within the range of 0.02～ 0.5mg/kg. The relative standard deviations ranged from 2.7% ～ 13.8%.
出处
《现代仪器》
2005年第4期52-55,共4页
Modern Instruments
基金
国家质检总局重点科研资助课题(K9602)
