Determination of Diphacinone in Sea Water, Vertebrates, Invertebrates, and Bait Pellet Formulations Following Aerial Broadcast on Mokapu Island, Molokai, Hawai‘i

Gale, Robert W.; Tanner, Michael; Orazio, Carl E.

Abstract:

This report presents the results of a study to determine diphacinone concentrations in samples of sea water and in fillet samples of fish and in limpets from the ocean adjacent to Mokapu Island and from reference samples from Molokai, Hawai‘i; concentrations of the active ingredient (diphacinone) were also determined in samples of the Ramik Green bait pellets used for the broadcast study. After preparation, diphacinone concentrations were determined with high-performance liquid chromatography with photodiode array detection. No detectable concentrations of diphacinone were found in the fish, limpets, or sea-water samples from Mokapu Island or from the reference sites. The limit of detection for diphacinone in sea water was 18 nanograms per milliliter (parts per billion); the limit of detection in fish fillets was 10 nanograms per gram (parts per billion); and the limit of detection in limpets was 17 nanograms per gram. The average concentration of diphacinone in the Ramik Green bait pellets was 45 micrograms per gram (parts per million), which represents 90 percent of the nominal concentration stated for the product by the manufacturer.

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USGS Numbered Series

ProdID:

86226

Citation Author:

Gale, Robert W.; Tanner, Michael; Orazio, Carl E.

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USGS Columbia Environmental Research Center

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Version 1.0

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ENGLISH

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Citation Phsyical Description:

iv, 16 p.

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Prepared in cooperation with the U.S. Fish and Wildlife Service, Region 1

Citation Publisher:

Geological Survey (U.S.)

Citation Series:

Open-File Report

Citation Series Code:

OFR

Citation Series Number:

2008-1285

Citation Search Results Text:

Determination of Diphacinone in Sea Water, Vertebrates, Invertebrates, and Bait Pellet Formulations Following Aerial Broadcast on Mokapu Island, Molokai, Hawai‘i; 2008; OFR; 2008-1285; Gale, Robert W.; Tanner, Michael; Orazio, Carl E.