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[Sampling of rainwater for the determination of mercury. An interim report.]

De monstername van regenwater voor de bepaling van kwik. Een tussenrapportage

Synopsis

The applicability of the wet-only rainwater-collectors of the Dutch 'Landelijk Meetnet Regenwater' for the sampling of rainwater for the determination of mercury was investigated. These collectors are applicable provided that the funnel and the collecting bottle are made of borosilicate glass. In the bottle an amount of concentrated HCL (1 + diluted with demineralized water) has to be placed prior to sampling in order to prevent losses of mercury caused by adsorption and/or volatilization. Diffusion of mercury from outer air to the collection liquid was negligible over a period of seven days.
 

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