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- W2071723307 abstract "Abstract Isotope dilution mass spectrometry (IDMS) has been applied for the accurate determinations of trace p,p′-DDE, p,p′-DDT, and γ-HCH in fish oil reference materials. A preparative LC with aminopropyl normal phase column was employed at the final stage of sample clean up processes to separate the three analytes and their isomers so that the thermal decompositions of coexisting isomers of DDT and DDD in GC elution processes do not interfere the accurate analysis of p,p′-DDE and p,p′-DDT. Fractions of the LC eluent containing the target analytes were collected and separately analyzed by GC/MS. Compared to chromatograms obtained from the extract without the LC separation, the chromatograms of the fractions containing each of the three analytes showed lower interference from the other target analytes, their isomers, the thermal decomposition products, and matrix residues. By the significant reduction of interference, the accuracy of the isotope ratio measurements by GC/MS has been greatly enhanced." @default.
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- W2071723307 date "2003-01-03" @default.
- W2071723307 modified "2023-09-24" @default.
- W2071723307 title "Preparative Liquid Chromatographic Separation for Accurate Determination ofp,p′-DDE,p,p′-DDT, and𝛄-HCH in Fish Oil by Isotope Dilution Mass Spectrometry" @default.
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- W2071723307 doi "https://doi.org/10.1081/al-120017271" @default.
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