LEAD IN EVAPORATED MILK BY ANODIC-STRIPPING VOLTAMMETRY AND ATOMIC-ABSORPTION SPECTROPHOTOMETRY - COOPERATIVE INTER-LABORATORY STUDY

  • 1 January 1978
    • journal article
    • research article
    • Vol. 61  (4) , 931-936
Abstract
The results of a cooperative study on the determination of Pb in evaporated milk, using a double blind referee technique, are reported. This study was designed to determine the normal variability of methods currently used for Pb analysis by canned food industry laboratories. Twenty-three laboratories participated in this study. Each laboratory was instructed to use atomic absorption spectrophotometry, anodic stripping voltammetry or carbon rod atomic absorption spectrophotometry. Overall, the results appeared to be in close agreement with the spiking levels. The coefficient of variation for all laboratories was 36.0% at the 0.15 ppm Pb level and 16.8% at the 0.40 ppm Pb level.

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