AbstractGet full access to this articleView all access options for this article.Get accessReferences1.Official and Tentative Methods of Analysis of the Association of the Official Agricultural Chemists; Association of Official Agricultural Chemists, ed. 6, chap. 29, Metals and Other Elements and Residues in Foods, pp. 444-456, 1945.2. Winter, W. : Indust & Engin. Chem., Anal. Ed. 5: 7, 1933.3.J. Assoc. Official Agr. Chem. 27: 246, 1944.