AOAC Methods in Codex STAN 234 (Preliminary Methods Review)

J. ASSOC. OH. ANAi.. CHEM. (VOL. 65, NO. 4, l982)

985

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Figure t. Plot of cadmium collaborative results vs cadmium reference values: 0, collaborative result used in calculation; A, Dixon test outlier; o, data not used because of procedural fault; - , linear regression line; - • ·, 95% prediction interval. each element on the pooled accuracy values of each commodity. Statistically real differences (99% level of confidence) in accuracies were found among the foodstuffs. For the green beans there was a significant {95% level of con– fidence) level-laboratory interaction for both cadmium and lead accuracy and a significant (95% level of confidence) level effect for cadmi·

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Figure 2. Plot of lead collaborative results vs lead reference values: O, collaborative result used in calculations; A, Dixon test outlier; D, data not used because of procedural fault; - , linear regression line; - • -, 95%prediction interval.

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