Cadmium determination of frozen cod: An interlaboratory comparison

Extract: Results of analyses of cod portions by 8 laboratories indicate that a substantial lack of agreement exists among laboratories and methods for cadmium (Cd) analysis. Consistent results for cod samples of low Cd content (biologically bound) were reported by only 3 of 8 participating laborator...

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Bibliographic Details
Published in:Journal of food protection 1983-02, Vol.46 (2), p.122-125
Main Authors: Slabyj, Bohdan M, Koons, Robert D, Bradbury, Harry E, Martin, Roy E
Format: Article
Language:English
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Summary:Extract: Results of analyses of cod portions by 8 laboratories indicate that a substantial lack of agreement exists among laboratories and methods for cadmium (Cd) analysis. Consistent results for cod samples of low Cd content (biologically bound) were reported by only 3 of 8 participating laboratories. These laboratories reported a mean Cd content of 0.323 ppm, with a coefficient of variation of 38%. Results were better when cod samples were spiked with Cd acetate at the 78 ppm level. Six of the 8 laboratories correctly reported that Cd content at the 78 ppm level (mean 71.2 ppm, with a coefficient of variation of 13%). Lack of consistency in determining biologically-bound Cd in cod tissue is attributed, in part, to loss of Cd during dry-ashing of tissue. Laboratories utilizing atomic absorption spectrophotometry or neutron activation analysis generally reported more accurate results than the laboratory utilizing argon-plasma atomic emission spectrometry. (author).
ISSN:0362-028X
1944-9097
DOI:10.4315/0362-028X-46.2.122