engleski

Pollution of electrochemical laboratory by gaseous mercury

A concentration of total gaseous mercury (TGM) was measured in the atmosphere of the electrochemical laboratory using a technique based on the preconcentration of mercury onto a gold wire followed by its thermal desorption and the determination by an atomic absorption spectrometry. A milliliter of liquid mercury was placed in the laboratory and its evaporation was investigated. In the open room the concentration of TGM after three hours was 0.6  g/m3, but when the room was closed for six hours, the concentration increased to 2.6  g/m3. After five hours of aeration the concentration was diminished to 0.2  g/m3. Hence, the atmosphere in electrochemical laboratories can satisfy the standard for mercury in non-occupational indoor environments (a ceiling level of 1  g/m3) if they are regularly aerated.

mercury vapour; atmosphere; electrochemical laboratory; occupational exposure

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