Cereal Chem 50:613 - 616.  |  VIEW ARTICLE
Occurrence of Lead in Sesame Paste and Factors Responsible for It.

S. Yannai and A. Haas. Copyright 1973 by the American Association of Cereal Chemists, Inc. 

Sesame paste was found to contain a relatively high concentration of lead (approximately 2.2 p.p.m.). Since storage in unlacquered cans, including an additional short-term test at 35 C., did not result in an increase over the initial level (found in paste from the same batch stored in polyethylene jars), the conclusion is that the above high figure is due not to migration of the metal present in the packaging material, but rather to an original high content in the oilseeds, as found in samples from three countries.