2Environmental Protection Agency, 1987, Pesticide As- sessment Guidelines, Subdivision O, Position Docu- ment, Effects of Storage (Storage Stability) on Validity of Pesticide Residue Data, EPA Report 540/09-88-002.
4United Nations Food and Agricultural Organization (FAO). Stability of Pesticide Residues in Stored Analytical Sam- pies. 1994 draft prepared by Codex Committee on Pesti- cide Residues Working Group on Methods of Analysis and Sampling.
5United Nations Food and Agricultural Organization (FAO). Guidelines on Pesticide Residue Trials to Provide Data for the Registration of Pesticides and the Establishment of Maximum Residue Limits--Part 1--Plants and Plant Products (1986).
6Pesticide Analytical Manual. Food and Drug Administra- tion. Volume I. (1994). Available from the National Technical Information Service, Springfield, VA.
