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2. Ali, M.S. (1989) Determination of Af-methylcarbamate pesticides in liver by liquid chromatography. J. Assoc. Off. Anal. Chem. 72, 586.
3. Analytical Methods Committee (1986) Analyst 111, 1089.
4. AOAC (1960) Official Methods of Analysis, 9th edn, Sec. 960.39, Association of Official Analytical Chemists, Arlington, Virginia.
5. AOAC International (1990) Official Methods of Analysis, 15th edn, Sec. 950.46A, 935.47, 935.48, 992.15, Association of Official Analytical Chemists, Arlington, Virginia.