Determination of carbetamide in groundwater by micro liquid-liquid extraction and gas chromatography-mass spectrometry |
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Authors: | A. González-Casado M. del Olmo F. Carricondo G. Muñoz F. Sánchez-Rasero J. L. Vílchez |
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Affiliation: | (1) Department of Analytical Chemistry, University of Granada, C/Fuentenueva, s/n., 18071 Granada, Spain |
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Abstract: | Summary A method is proposed for the determination of carbetamide in water below European Union guidelines (detection limit,DL, below 0.1 μgL−1). Micro liquid-liquid extraction with dichloromethane affords carbetamide which is converted to aniline by hydrolysis. Identification and quantification of aniline was performed by GC-MS. The retention time was 4.24 min. Quantification was achieved by single-ion monitoring (SIM) atm/z 66 and 93. Clean-up is not necessary before SIM. Deuterated anthracene (2H10-anthracene) was used as internal standard. The method was used to determine carbetamide in different types of water sample spiked at very low concentration levels (0.13–10.00 μgL−1). TheDL was 0.04 μgL−1. The effect of the presence of other carbamates was also studied. |
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Keywords: | Gas chromatography-mass spectrometry Micro liquid-liquid extraction Carbetamide Groundwater |
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