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Direct analysis in real time mass spectrometry for the rapid identification of four highly hazardous pesticides in agrochemicals
Author(s) -
Wang Lei,
Zhao Pengyue,
Zhang Fengzu,
Li Yanjie,
Pan Canping
Publication year - 2012
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.6274
Subject(s) - dart ion source , chemistry , dart , hazardous waste , mass spectrometry , ambient ionization , carbofuran , pesticide , environmental chemistry , analytical chemistry (journal) , chromatography , chemical ionization , ionization , waste management , electron ionization , ion , agronomy , organic chemistry , computer science , programming language , biology , engineering
RATIONALE Direct analysis in real time (DART) is a new ion source technique, which is conducted in the open air under ambient conditions, applied to the rapid and direct analysis of any material (gases, liquids, and solids) with minimal or no sample preparation. In order to take advantage of the capacity of DART mass spectrometry for the real‐time analysis of hazardous ingredients in commercial agrochemicals, a pilot study of rapid qualitative determination of hazardous pesticides was performed. METHODS Highly hazardous pesticides were identified by DART ionization coupled to a single‐quadrupole mass spectrometer (DART‐MS). Acetonitrile was chosen for dissolving samples prior to the analysis. Samples were analyzed by this technique in as little as 5 s. RESULTS Phorate, carbofuran, ethoprophos and fipronil were be detected directly from commercial agrochemicals. The ionization‐related parameters (DART temperature, grid voltage and MS fragment) of these compounds were optimized to obtain highly response. Isotope patterns were taken into consideration for qualitative identification. Relative standard deviations (RSDs, n = 5) of 2.3–15.0% were obtained by measuring the relative abundance of selected isotopes. CONCLUSIONS This study showed that DART‐MS technology was able to qualitatively determine the existence of highly hazardous pesticides in commercial pesticide formulations. It is suggested that this technology should be applied for routine monitoring in the market. Copyright © 2012 John Wiley & Sons, Ltd.