ABSTRACT

Association of Official Analytical Chemists,’’ 13th Ed. (1980), sections 32.001-32.003, which is incorporated by reference. Copies are available from the Association of Official Analytical Chemists International, 481 North Frederick Ave, suite 500, Gaithersburg, MD 20877-2504, or available for inspection at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.