caa a22 4500 465748910 CHVBK 20180323111828.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00322508 doi (NATIONALLICENCE)springer-10.1007/BF00322508 Characterization of ARC/CL wheat flour, pork meat and skim milk powder reference materials for contents of toxic elements [Elektronische Daten] [Jorma Kumpulainen, Maija Paakki, Raija Tahvonen] Summary: Wheat flour, pork meat and skim milk powder reference materials (RM) prepared and employed for the activities of the Sub-network on Trace Element Status in Food of the FAO European Cooperative Research Network on Trace Elements were subjected to an interlaboratory comparison study on the contents of Pb, Cd and Hg. The homogeneity of the above materials had earlier been shown to be within 2% for several essential elements and within 5 to 10% for Pb and Cd. An interlaboratory comparison study was conducted involving 17 reference laboratories recognized for their reliability and specialized in heavy metal determinations in biological materials. A total of seven methods based on four different analytical principles were employed to determine the contents of the above heavy metals. After the exclusion of outliers, the recommended concentration values expressed as the medians ±95% confidence limits were established. All of the recommended values reported here fell into category A, i.e. values recommended with a high degree of confidence according to the certification criteria established by Pszonicki. The present materials contain very low naturally occurring levels of all the heavy metals studied and have been successfully employed in the analytical quality control program of the above FAO study during the past five years. Springer-Verlag, 1990 Kumpulainen Jorma Institute of Food Research and Central Laboratory, Agricultural Research Centre of Finland, SF-31600, Jokioinen, Finland aut Paakki Maija Institute of Food Research and Central Laboratory, Agricultural Research Centre of Finland, SF-31600, Jokioinen, Finland aut Tahvonen Raija Institute of Food Research and Central Laboratory, Agricultural Research Centre of Finland, SF-31600, Jokioinen, Finland aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/4(1990-01-01), 423-425 0937-0633 338:4<423 1990 338 216 https://doi.org/10.1007/BF00322508 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00322508 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kumpulainen Jorma Institute of Food Research and Central Laboratory, Agricultural Research Centre of Finland, SF-31600, Jokioinen, Finland aut NATIONALLICENCE 700 1- Paakki Maija Institute of Food Research and Central Laboratory, Agricultural Research Centre of Finland, SF-31600, Jokioinen, Finland aut NATIONALLICENCE 700 1- Tahvonen Raija Institute of Food Research and Central Laboratory, Agricultural Research Centre of Finland, SF-31600, Jokioinen, Finland aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/4(1990-01-01), 423-425 0937-0633 338:4<423 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer