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Canadian Total Diet Study in 1998: Pesticide levels in foods from Whitehorse, Yukon, Canada, and corresponding dietary intake estimates

2004; Taylor & Francis; Volume: 21; Issue: 3 Linguagem: Inglês

10.1080/02652030310001655470

1464-5122

Dorothea F.K. Rawn, Xu‐Liang Cao, Josée Doucet, David Davies, W. F. Sun, Robert Dabeka, W Harvey Newsome,

Pesticide Residue Analysis and Safety

Abstract The Canadian Total Diet Study is a national survey to determine the level of chemical contaminants in the Canadian food supply. Food samples were collected from Whitehorse, Yukon, supermarkets as part of the study in 1998. Whitehorse was chosen as a sampling centre, despite its small population (n = 19 000), to determine if residue levels were different in foods available in northern communities relative to levels observed in previous studies in the more populated south. Foods were prepared as for consumption before pesticide residue analysis. Residue levels observed in most foods were similar to levels observed in samples from previous surveys from southern Canadian cities. Malathion and DDE (1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene), a transformation product of DDT (1,1,1-trichloro-2,2-bis(p-chlorophenyl(ethane), were the two most frequently detected compounds (26.4 and 25.8%, respectively). The majority of pesticides, however, had a detection frequency of <5%. In general, pesticides in food composites were well below maximum residue limits established in the Canadian Food and Drug Regulations. Chlorpropham and captan had the highest dietary intakes (2.16 and 1.94 µg (kg body weight-day)−1, respectively), based on the results from Whitehorse. No dietary intakes above the acceptable daily intakes, however, were observed for any of the 39 pesticides investigated in any age–sex category, where an acceptable daily intake has been proposed. Keywords: total diet studypesticidesorganochlorinesorganophosphatesdietary exposuredietary intakenorthern communityCanada Acknowledgements The authors gratefully acknowledge the assistance of Frank Lancaster, Food Research Division, for the organization of the sample collection and distribution, and Colette Tracy, Cheryl Wightman, Nancy Walker and Ellen Mooney, Kemptville College, University of Guelph, for the preparation of food composites.