加速溶剂萃取-气相色谱-负化学离子化质谱法测定土壤中有机磷农药

Determination of Organophosphorus Pesticides in Soil Using Accelerated Solvent Extraction and Gas Chromatography and Negative Chemical Ionization Mass Spectrometry

用加速溶剂萃取法(ASE)萃取土壤中的有机磷农药,用气相色谱-负化学离子化质谱法(GC-NCI-MS)进行测定,并与气相色谱-电子轰击电离质谱法(GC-EI-MS)进行了对比。结果表明,EI法和NCI法均能满足目前的有机磷农药的分析需要。GC-EI-MS的适用范围比较广,操作比较简单;GC-NCI-MS在选择性和灵敏度等方面均具有较强优势。

An effective method for trace analysis of organophosphorus pesticides in soil was developed using accelerated solvent extraction （ ASE） followed by gas chromatography-electron ionization-mass spectrometry （ GC-EI-MS） and gas chromatography-negative chemical ionization- mass spectrometry （ GC-NCI-MS ） . The results show that both GC-EI-MS and GC-NCI-MS are sufficient for the daily analysis. GC-EI-MS method has an extensive application scope and is easy to operate. Also the GC-NCI-MS method has advantages in selectivity and sensitivity.