posure assessment of the Belgian population to pesticide residues through fruit and vegetable consumption. Food Additives and Contaminants, 2008, 25 (07) 12screening of pesticide residue exposure was performed by a deterministic approach. 13For most pesticide residues studied, the exposure was hundred times lower than the 14 ADI ('acceptable daily inatke'). However, for a high consumer (97.

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A procedure was developed for storing the N2O in 50‐mL air samples on activated molecular‐sieve type 5A in 60‐mL serum bottles. The procedure was equally effective for N2O concentrations of 1 and 10 µL · L−1 and storage times up to 6 weeks. Blank values for sieves stored 3 to 5 months after activation ranged from about 0.04 ± 0.002 to 0.05 ± 0.005 µL · L−1. Allowing freshly activated sieves to cool in air before capping the bottles increased blank values and variability to unacceptable levels. Nitrous oxide fluxes from soil > 10 g N · ha−1 · d−1 could be reliably determined when the storage procedure was used in conjunction with a chamber method for N2O flux measurement.