Abstract
Routine preparation of pure tetramethyl lead from minerals containing more than 1% of lead has been carried out on a small scale by a method involving reactions not hitherto used in this type of work. The method is simple to operate, involves the use of a minimum of reagents, and has been applied successfully to all types of lead mineral so far encountered. PbCl2 is prepared by an HCl leach followed by precipitation from ethanol. It is then treated, in ether solution, with LiCH3 in the presence of excess CH3I, and the product is purified by vacuum distillation. Some further observations are made on a previously reported side-product of the preparation which leads to a wrong value of the lead isotope abundances.
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