Radiolytic products of N,N,N',N'-tetrabutyl-3-oxa-pentanediamide: qualitative analysis of radiolytic products

For studying radiolytic products of N,N,N',N'-tetrabutyl-3-oxa-pentanediamide (TBOPDA), gas chromatography/mass spectrometry (GC/MS) was used, combined with head-space solid-phase micro-extraction (HS-SPME). The chromatograms were compared with different SPME fibres, and the results were nearly the same. Influence of the extraction temperature was also studied. The mass spectra were compared with standard spectra and analyzed artificially. Radiolytical products of TBOPDA were confirmed as Dibutylamine (DBA), Tributylamine (TBA), N,N-dibutylformamide(DBFA), N,N-dibutylacetamide (DBAA), HOCH2CON(C4H9)2, and CH3OCH2CON(C4H9)2 , with HOCOCH2OCH2CON(C4H9)2 or HCOCH2OCH2CON(C4H9)2 being possible radialytic product. Comparisons with standard substances were also carried out on DBA, TBA, DBFA and DBAA. According to the radiolytic products, possible ways of the degradation were proposed. (authors)