PESTICIDE RESIDUES IN FOOD - 1983


    Sponsored jointly by FAO and WHO






    EVALUATIONS 1983





    Data and recommendations of the joint meeting
    of the FAO Panel of Experts on Pesticide Residues
    in Food and the Environment and the
    WHO Expert Group on Pesticide Residues
    Geneva, 5 - 14 December 1983

    Food and Agriculture Organization of the United Nations
    Rome 1985

    ETHION

    RESIDUES

    Explanation

    The Codex Committee on Pesticide Residues requested the Meeting to
    reconsider the definition of the residue. The original data from the
    1968 and 1972 Meetings 1/ were studied and the relevant information
    is summarized in this re-evaluation.

    RESIDUES RESULTING FROM SUPERVISED TRIALS

    Ethion residues are reduced by oxidation to monoxon and dioxon
    derivatives and by their subsequent hydrolysis. The rate of
    degradation on/in plants decreases in following order: dioxon monoxon
    ethion. No dioxon derivative was detected in various plant samples,
    except maize forage where its concentration was approximately 5 to 10
    percent of the total residue. The proportions of monoxon derivative in
    the total residue are summarized in FAO/WHO 1972 (p. 273). No maximum
    residue level was recommended in dried prunes and raisins. However, it
    should be noted that the total residue consists of approximately 25
    percent and 50 percent monoxon, respectively.

    RECOMMENDATION

    The Meeting concluded that the metabolites are excluded from the
    definition of the residue. The maximum residue limits refer to the
    parent compound alone. The new definition does not alter the limits
    recommended previously.











              

    1/ See Annex 2 for FAO and WHO documentation.

    See Also:
       Toxicological Abbreviations
       Ethion (ICSC)
       Ethion (FAO/PL:1968/M/9/1)
       Ethion (FAO/PL:1969/M/17/1)
       Ethion (AGP:1970/M/12/1)
       Ethion (WHO Pesticide Residues Series 2)
       Ethion (WHO Pesticide Residues Series 5)
       Ethion (Pesticide residues in food: 1982 evaluations)
       Ethion (Pesticide residues in food: 1986 evaluations Part II Toxicology)
       Ethion (Pesticide residues in food: 1990 evaluations Toxicology)