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Eur. J. Mass Spectrom. 4, 47 - 54 (1998) |
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Identification of isomeric tributylphosphate dimers formed by radiolysis using tandem mass spectrometry and stable isotopic labelling | ||
Denis Lesage,* Henri Virelizier and Christopher K. Jankowski |
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ABSTRACT: | ||
Tributylphosphate (TBP) dimers, formed during radiolysis of the nuclear fuel reprocessing solvent, were studied using tandem mass spectrometry (MS/MS), stable isotopic labelling (2H) and synthetic model compounds. The structures of isomeric dimers and their lower homologues were established, using GC/MS as well as electron impact and chemical ionisation GC/tandem mass spectrometry, with an extensive use of ion chromatograms of characteristic fragment ions from collision-induced decomposition in both non-deuterated and selectively deuterated series. An explanation of isomer ratios and of the restricted number of lower homologues as well as a radiolytic mechanism are advanced. The TBP-dimer fraction represented less than ~ 0.03% of the total mixture obtained from radiolysis of solvent. | ||
Keywords: Tributylphosphate, tributylphosphate dimers, radiolysis, tandem mass spectrometry, phosphate, PUREX. |
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