STP802

    Interlaboratory Comparison of a 28-Day Toxicity Test with the Polychaete Neanthes arenaceodentata

    Published: Jan 1983


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    Abstract

    An interlaboratory comparison of toxicity tests with the polychaete Neanthes arenaceodentata was conducted to determine the amount of variability expected with this test. Six laboratories each conducted two 28-day flow-through tests, one with silver [as silver nitrate (AgNO3)] as the toxicant and the other with the pesticide endosulfan. Muffled sand (from nonpolluted beaches) was used as sediment in the tests. The mean 28-day median lethal concentrations (LC50s) (based on measured concentrations) for the participating laboratories were 165 ± 52 µg/L and 106 ± 24 µg/L for the tests with silver and endosulfan, respectively. The ratio of the highest to the lowest LC50 value was 2.23 for silver and 1.81 for endosulfan. Therefore, the variability between laboratories was low for this test with N. arenaceodentata.

    Keywords:

    silver, toxicity test, pesticide, endosulfan, polychaetes, Neanthes arenaceodentata, interlaboratory comparison, aquatic toxicology, hazard assessment


    Author Information:

    Pesch, CE
    Research aquatic biologist and research chemist, U.S. Environmental Protection Agency, Environmental Research Laboratory, Narragansett, RI

    Hoffman, GL
    Research aquatic biologist and research chemist, U.S. Environmental Protection Agency, Environmental Research Laboratory, Narragansett, RI


    Paper ID: STP33525S

    Committee/Subcommittee: E47.01

    DOI: 10.1520/STP33525S


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