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Ultrasound-assisted emulsification microextraction of organolead and organomanganese compounds from seawater, and their determination by GC-MS |
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| Authors: | Natalia Campillo Juan Ignacio Cacho Javier Marín Pilar Viñas Manuel Hernández-Córdoba |
| Institution: | 1. Department of Analytical Chemistry, Faculty of Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100, Murcia, Spain |
| Abstract: | We describe a simple method for the simultaneous determination of organolead and organomanganese compounds in seawater samples. It is based on ultrasound-assisted emulsification microextraction. Trimethyllead, triethyllead, tetraethyllead, cyclopentadienylmanganese tricarbonyl and its methyl derivative were separated and determined using gas chromatography and mass spectrometry. Trimethyllead and triethyllead were derivatized with sodium tetraphenylborate before being submitted to the preconcentration step. Detection limits ranged from 7.0 to 41 ng L?1 depending on the compound. Recoveries ranged from 84 to 118 %, depending on the compound and the sample analyzed. Seawater samples were collected at different sites of the Cartagena Bay and none of the target analytes were found at levels above the corresponding detection limits. The most relevant organomanganese and organolead compounds can be monitorized in seawaters by using a relatively simple instrumentation (Gas chromatography–mass spectrometry). Advantage is taken of ultrasound-assisted emulsification microextraction that involves minimal amounts of organic solvents |
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