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Preparation, homogeneity and stability studies of a natural milk powder material and subsequent certification of the mass fraction of five polychlorodibenzo-p-dioxins (D48, D54, D66, D67, D70) and six polychlorodibenzo furans (F83, F94, F114, F118, F121, F130) are described. The material, certified reference material (CRM) 607, is intended for use in the method validation and quality control of the complete analytical procedure for congener-specific determination of dioxins in milk powder and similar dairy products and was certified in an interlaboratory study for: 2,3,7,8-TCDD, 0.25 ngkg{-1}; 1,2,3,7,8-PeCDD, 0.79 ngkg {-1}; 1,2,3,4,7,8-HxCDD 0.42 ngkg {-1}; 1,2,3,6,7,8-HxCDD, 0.98 ngkg {-1}; 1,2,3,7,8,9-HxCDD, 0.34 ngkg {-1}; 2,3,7,8-TCDF, 0.05 ngkg {-1}; 1,2,3,7,8-PeCDF, 0.054 ngkg {-1}; 2,3,4,7,8-PeCDF, 1.81 ngkg {-1}; 1,2,3,4,7,8-HxCDF, 0.94 ngkg {-1}; 1,2,3,6,7,8-HxCDF, 1.01 ngkg {-1} and 2,3,4,6,7,8-HxCDF, 1.07 ngkg {-1}. An indicative (non-certified) value was assigned to the mass fraction of the hepta-chlorinated and octachlorinated congeners D73, D75, F131, F134, F135 and the HxCDF F124.

Additional information

Authors: TUINSTRA L G M T, RIKILT-DLO, Wageningen (NL);STARTIN J R, CSL Food Science Laboratory, Norwich (GB);MAIER E A, CEC Bruxelles (BE);KRAMER G N, JRC Geel (BE)
Bibliographic Reference: Article: Fresenius Journal of Analytic Chemistry, Vol. 359 (1997) pp. 222-229
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