QUALITY-CONTROL IN THE SPECIATION ANALYSIS OF BUTYLTIN COMPOUNDS IN MARINE BIOLOGICAL SAMPLES BY HYDRIDE GENERATION COLD TRAPPING AND ONLINE QUARTZ FURNACE ATOMIC-ABSORPTION SPECTROMETRY
F. Pannier et al., QUALITY-CONTROL IN THE SPECIATION ANALYSIS OF BUTYLTIN COMPOUNDS IN MARINE BIOLOGICAL SAMPLES BY HYDRIDE GENERATION COLD TRAPPING AND ONLINE QUARTZ FURNACE ATOMIC-ABSORPTION SPECTROMETRY, Applied organometallic chemistry, 8(7-8), 1994, pp. 595-600
The determination of tributyltin (TBT) in sea food (mussel, oyster, fi
sh) by a hydride generation-cold trapping-quartz furnace atomic absorp
tion spectrometry procedure has been studied with emphasis on quality
control. Large amounts of spiked materials have been prepared and stor
ed either frozen, or frozen after freeze-drying. Extraction of TBT by
0.1 M hydrochloric acid in methanolic solution is efficient (88-96%) f
or wet samples or freeze-dried samples. It is also efficient with fres
hly spiked materials. Consumption of sodium borohydride by the matrix
makes it necessary to use quite large amounts of reagent to obtain opt
imal sensitivity. Analysis of a fish-tissue Certified Reference Materi
al seems to indicate a partial debutylation of TBT during transport an
d/or storage of this material.