Abstract
Volatile Tetramethyllead was detected in culture flasks in which sediments from various locations in Ontario were incubated with and without the addition of extraneous organic and inorganic lead compounds. Under optimum laboratory conditions, the maximum rate for the conversion was ca. 6% of the lead at 20°C. The conversion rate was lower at lower temperatures. Several pure bacterial cultures were found to methylate Trimethyllead acetate but not inorganic lead to Me4Pb. Chemical disproportionation reactions of Me3PbOAc to Me4Pb accounted for ca. 15–20% as compared with the biological reactions. Me4Pb was much toxic to several algae than organic and inorganic lead compounds.
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