The organising and running of four inter-laboratory calibration exercises in South Africa in 1981 are described. Analyses of a solution containing pesticides, margarine and fruit pulp fortified with pesticides and a potato sample with incurred residues were carried out. The results indicate that most laboratories produced acceptable results. This type of exercise should be continued.
L. P. van Dyk, L. Lotter, P. R. de Beer, A. de Klerk, A. J. Viljoen and S. M. Prinsloo, Analyst, 1983, 108, 748 DOI: 10.1039/AN9830800748
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