ISSN:
0951-4198
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
A multiresidue method was developed for the trace level determination of sulfonylurea herbicides in aqueous samples. The method employs on-line solid-phase extraction and electrospray and thermospray reversed-phase liquid chromatography mass spectrometry. In combination with time-scheduled selected-ion monitoring, the method permits the detection of the sulfonylureas down to the 50-100 ng/L level with excellent recoveries of 〉 90% and reproducibilities between 2 and 8.5% for almost all of the investigated compounds. This improved method is superior to existing techniques because no special clean-up step is necessary, and owing to the fast online preconcentration step, the technique can be used as a rapid screening and confirmatory method. The method can be used with either thermospray cr electrospray mass spectrometry, both of which provided mass spectra with at least three structure-signficant ions necessary for an unambiguous identification in environmental samples.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/rcm.1290090909
