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

Open-File Report 2008-1285

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

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Determination of Diphacinone in Sea Water, Vertebrates, Invertebrates, and Bait Pellet Formulations Following Aerial Broadcast on Mokapu Island, Molokai, Hawai'i
Series title:
Open-File Report
Series number:
2008-1285
Edition:
Version 1.0
Year Published:
2008
Language:
ENGLISH
Publisher:
Geological Survey (U.S.)
Contributing office(s):
Columbia Environmental Research Center
Description:
iv, 16 p.