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- W2019185729 abstract "A single-step, environmentally friendly sample treatment was developed and used in combination with liquid chromatography-tandem mass spectrometry (LC-MS/MS) for the quantitation of hexabromocyclododecane (HBCD) stereoisomers in fish. It was based on the microextraction of the stereoisomers with a supramolecular solvent (SUPRAS) made up of reverse aggregates of decanoic acid (DeA). The procedure involved the stirring of the fish sample (750 mg) with 600 μL of SUPRAS for five minutes, subsequent centrifugation for extract separation from matrix components and direct analysis of the extract after dilution 1:1 with methanol. Individual enantiomers of α-, β- and γ-HBCD were separated on a chiral stationary phase of β-cyclodextrin and quantified by monitoring of the [M-H](-)→Br(-) transition at m/z 640.9→80.9. Driving forces for the microextraction of HBCD in the SUPRAS involved both dispersion and dipole-dipole interactions. Quantitation limits for the determination of individual HBCD enantiomers in hake, cod, sole, panga, whiting and sea bass were within the intervals 0.5-3.4 ng g(-1), 0.9-2.5 ng g(-1), 0.6-1.4 ng g(-1), 1.0-5.6 ng g(-1), 0.8-1.3 ng g(-1) and 0.5-3.5 ng g(-1), respectively. Recoveries for fish samples fortified at the ng g(-1) level ranged between 87 and 114% with relative standard deviations from 1 to 10%. The sample treatment proposed greatly simplifies current procedures for extraction of HBCD stereoisomers and is a useful tool for the development of a large scale database for their presence in fish." @default.
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- W2019185729 date "2012-11-01" @default.
- W2019185729 modified "2023-10-12" @default.
- W2019185729 title "Enantiomer-specific determination of hexabromocyclododecane in fish by supramolecular solvent-based single-step sample treatment and liquid chromatography–tandem mass spectrometry" @default.
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- W2019185729 doi "https://doi.org/10.1016/j.aca.2012.09.039" @default.
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