375 Pesticides x 5 Ions Exact Mass Database for Multi-residue Pesticide Analysis
Introduction
The AccuTOF GCx has high sensitivity, high mass resolution, high mass accuracy, a wide dynamic range and a high speed acquisition rate, all simultaneously (Figure 1).
Additionally, JEOL has developed a pesticides exact mass database that consists of 5 ions each for 375 different compounds which means that there are 1,875 total exact masses for multi-residue pesticide analysis. And because the TOF continuously collects the complete m/z region for each mass spectrum, we do not need to setup any SIM or SRM conditions, as is done for QMS and QqQMS systems. Therefore, the TOFMS can be used for both quantitative and qualitative analysis, simultaneously. In this application note, we show a portion of the pesticide database and the advantages of the GC/HR-TOFMS system for the multi-residue pesticide analysis.
Sample and Instrument
Commercially-available pesticide standards PL2005 Pesticide GC-MS Mix I, II, III, IV, V, VI, and VII (Hayashi Pure Chemical Ind.,Ltd.) were measured using GC/EI. After the measurement, a one-point drift compensation with m/z 207.03235 (C5H15O3Si3+, column background) was used to calibrate the exact mass information for all pesticides.