Abstract:

In order to assess and maintain the quality safety of agricultural products, a liquid chromatography-tandem mass spectral database was constructed for more than 50 pesticides using ion-trap mass spectrometry, which was helpful to rapid selection and qualification of unknown pesticides in agricultural products by database searching. The qualification of unknown pesticides could be achieved by aligning their retention time, MS/MS extracted ion current chromatogram, UV absorption spectrum with those of standard substances. The developed database was successfully used for the qualification of unknown pesticides in real samples. This demonstrates its good applicability.

Key words: mass spectral database, pesticide multi-residue analysis, library search