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\bibitem{Eyckmans_etal2001} {\textquotedblleft}\textit{Leaching of nutrients and trace metals from aerosol samples: a comparison between a re-circulation and an ultrasound system}{\textquotedblright}. Eyckmans K, Zhang J, de Hoog J, Joos P, Van Grieken R, International journal of environmental analytical chemistry \textbf{80}, 227 (2001).   http://doi.org/10.1080/03067310108044372

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