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  • Title: Rapid digestion and flameless atomic absorption spectroscopy of mercury in fish: collaborative study.
    Author: Munns RK, Holland DC.
    Journal: J Assoc Off Anal Chem; 1977 Jul; 60(4):833-7. PubMed ID: 561050.
    Abstract:
    A collaborative study of the determination of mercury in fish has been completed in which wet oxidation of fish tissue in nitric acid, using vanadium as a catalyst, is compared with the AOAC official final action digestion technique, 25.103-25.105, involving a nitric-perchloric acid mixture. The study used tuna fish samples of known mercury content and included spike recovery studies in which methyl mercury solutions of known composition were provided to each laboratory. The study was designed to provide recovery information that bracketed the regulatory level of mercury in fish. The results indicate that the proposed digestion method is at least as precise and accurate as the AOAC method. The proposed method is also more rapid and less hazardous. It has been adopted as official first action.
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