PESTICIDE RESIDUES IN FOOD - 1983
Sponsored jointly by FAO and WHO
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
The Codex Committee on Pesticide Residues requested the Meeting
to reconsider the definition of the residue. The original data
submitted to the 1972 Meeting1 and some additional data were studied,
The relevant information is summarized in this re-evaluation.
RESIDUES RESULTING FROM SUPERVISED TRIALS
The results of supervised trials carried out in beans, oilseed,
rape, cotton and citrus fruit indicate that the oxygen analogue of the
parent compound and its relevant sulphoxide and sulphone are either
present in very low concentrations or are not detectable.
Consequently, they can be excluded from the definition of the residue.
The proportion of parent compound in the total residue was also
considered. However, most of the results obtained in supervised trials
were presented as a sum of sulphoxide and sulphone. Therefore, the
estimation of maximum residue levels (MRLs) based on the parent
compound alone was not possible.
The Meeting concluded that the oxygen analogue of the parent
compound and its relevant sulphoxide and sulphone can be excluded from
the definition of the residue. The MRLs, which remain the same, refer
to the sum of carbophenothion, its sulphoxide and sulphone, expressed
1 See Annex 2 for FAO and WHO documentation.