Agilent Technologies analyzes carbamates and phenyl ureas using liquid chromatography/mass spectrometry
Agilent Technologies Inc. announced analyses of carbamates and phenyl ureas using liquid chromatography/mass spectrometry (LC/MS). The sources for these tests were electrospray ionization (ESI), atmospheric pressure chemical ionization (APCI) and atmospheric pressure photo ionization (APPI).
Carbamates, a class of highly effective insecticides, are widely used to protect crops from pests. Phenyl ureas, a class of herbicides, are highly potent chemicals for agricultural weed control. Both are potential endochrine disrupters found in groundwater and surface-water samples.
Agilent application chemists analyzed carbamates and phenyl ureas using ESI, APCI and APPI sources. Results show that the ESI source, in general, gives better signal-to-noise ratios for carbamates. In contrast, APPI and APCI sources give better signal-to-noise ratios for phenyl ureas. A small amount of post-column acetone was needed in the APPI source as a dopant to improve analyte response.
For further information, request application note "Analyzing Phenyl Ureas and Carbamate Pesticides Using ESI-, APPI-, and APCI-LC/MSD," Agilent publication number 5988-6635EN.
Quelle: Agilent Technologies
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