Characterization of Carbamate Pesticides in Natural Water from Cameroon |
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Authors: | Edouard Akono Nantia Faustin P T Manfo Jean Sonchieu Paul F Moundipa Ana M García-Campaña |
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Institution: | 1. Department of Biochemistry, Faculty of Science, University of Bamenda, Bambili, Cameroon;2. Department of Biochemistry and Molecular Biology, Faculty of Science, University of Buea, Buea, Cameroon;3. High Technical Teacher Training School, University of Bamenda, Bambili, Cameroon;4. Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon;5. Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Granada, Spain |
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Abstract: | With the increased use of chemicals in agriculture for crop protection and improvement of yield, the contamination of water is currently a serious health concern. This study used solid-phase extraction with ultra-high-performance liquid chromatography–tandem mass spectrometry to evaluate the presence of 23 carbamate pesticides in waters from Cameroon. The separation was achieved in 5.5?min using a C18 column (50?×?2.1?mm, 1.8?µm) with a mobile phase composed of water and methanol each containing 0.01% formic acid. The analytes were determined in positive multiple reaction monitoring mode. The recoveries for fortified water were from 75 to 99%, with relative standard deviations below 13%. The limits of detection ranged from 0.003 to 0.397?µg?L?1. The reported method is simple, sensitive, and accurate, and is a suitable alternative for routine monitoring of pesticide residues at ultra-trace levels. The analysis revealed the presence of propoxur at a concentration of 0.072?µg?L?1 in stream water. |
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Keywords: | Carbamates ultra-high-performance liquid chromatography–tandem mass spectrometry natural water solid-phase extraction |
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