This study describes the simultaneous direct determination of endothall, glyphosate, AMPA, and glufosinate in drinking water by IC-MS. The four pesticides can be determined sensitively and accurately using a Dionex IonPac AS19-4μm column and an ISQ EC single quadrupole mass spectrometer.
Endothall, a widely used herbicide for both terrestrial and aquatic weeds, is a regulated contaminant for drinking water having a California Public Health Goal of 580 ppb. Here trace-level endothall in a saline water sample was determined directly without labor-intensive sample preparation by IC-MS-MS. The MS/MS instrument was operated in selected reaction monitoring (SRM) mode, requiring minimal sample cleanup and ensuring highly sensitive (low ppb) and selective quantitation. Isotope labeled glutaric acid (glutaric acid–d6) was used as an internal standard to ensure quantitation accuracy.
Endothall, a widely used herbicide for both terrestrial and aquatic weeds, is a regulated contaminant for drinking water with a California Public Health Goal of 580 ppb. Here trace-level endothall in a lake water sample was determined directly without labor-intensive sample preparation by IC-MS-MS. The MS/MS instrument was operated in selected reaction monitoring (SRM) mode, requiring minimal sample cleanup and ensuring highly sensitive (low ppb) and selective quantitation. Isotope labeled glutaric acid (glutaric acid–d6) was used as an internal standard to ensure quantitation accuracy.
