title: Investigation of the species-specific degradation behaviour of methylmercury and ethylmercury under microwave irradiation.
abstract: The degradation behaviour of methylmercury (MeHg) under microwave irradiation is investigated, as is the (different) degradation behaviour of ethylmercury (EtHg) under similar irradiation. A simple and highly sensitive SPME-GC-pyrolysis-AFS system was used to analyse the aqueous MeHg and EtHg standard solutions after derivatization with sodium tetraphenylborate (NaBPh(4)). Samples were irradiated in a microwave digester at microwave powers ranging from 20 to 160 W for durations of 2 to 10 min. The different tolerances towards microwave treatment of the two organomercury species were evident. Practically no degradation was experienced for MeHg for up to 8 minutes of irradiation at 120 W or for up to 4 minutes at 160 W. Significant analyte loss was observed for EtHg after 2 minutes at 40 W of microwave power.
authors: Department of Applied Chemistry, Corvinus University of Budapest, Villányi út 29-33, 1118 Budapest, Hungary. laszlo.abranko@uni-corvinus.hu
authors: László
authors: L
authors: Abrankó
authors: Zsuzsa
authors: Z
authors: Jókai
authors: Péter
authors: P
authors: Fodor