Abstract
An ion-trap mass spectrometer for determination of quaternary ammonium herbicides in water samples is evaluated. Implementation of the method previously optimized in a quadrupole mass spectrometer (VG Platform II) in an ion-trap (LCQ) required modifications to the sample inlet of the electrospray source. Quality parameters were established and detection limits, after trace enrichment, range 5–50 ng L−1. Good reproducibilities (day-to-day and run-to-run) <12% were obtained. The method was applied to analysis of spiked samples and the results were comparable with those determined using a quadrupole mass spectrometer.
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