Update: 28 September, 2023
This document describes the successful analysis of carbamates (a class of highly effective insecticides) and phenyl ureas (a class of herbicides) using liquid chromatography/mass spectrometry with electrospray ionization (ESI), atmospheric pressure chemical ionization (APCI), and atmospheric pressure photo ionization (APPI) sources. APPI and APCI exhibited lower background signals and fewer background peaks than ESI. Phenyl ureas, in general, exhibited better signal-to-noise ratios (S/N) from APCI or APPI than from ESI. However, it was just the opposite for carbamates. The S/N was better from ESI than from APCI or APPI. A small amount of post-column acetone was needed in the APPI source as a photoionizable dopant for charge transfer to the analyte.
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MD5 Checksum: 0B7109A7E80C8BFBC69CB80E88319092
Publication date: 12 June, 2012
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PDF Link: Agilent Analyzing Phenyl Ureas Carbamate Pesticides Using ESI- APPI- APCI-LC/MSD Manual PDF