Quantification and characterization of the trifluoroacetic anhydride derivatives of N,N′-ethylenebisstearamide and N,N′-ethylenebisoleamide

An analytical technique for the measurement of low levels (0.1–3.0%) of N,N′-ethylenebisstearamide (EBS) and N,N′-ethylenebisoleamide (EBO) in polymeric matrices has been developed. The method involves reaction of the secondary bis-amides with trifluoroacetic anhydride (TFAA) followed by high-perfor...

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Bibliographic Details
Published in:Journal of Chromatography A 1989, Vol.479 (1), p.107-116
Main Authors: Metz, P.A., Morse, F.L., Theyson, T.W.
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Chromatographic methods and physical methods associated with chromatography
Exact sciences and technology
Other chromatographic methods
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Summary:An analytical technique for the measurement of low levels (0.1–3.0%) of N,N′-ethylenebisstearamide (EBS) and N,N′-ethylenebisoleamide (EBO) in polymeric matrices has been developed. The method involves reaction of the secondary bis-amides with trifluoroacetic anhydride (TFAA) followed by high-performance liquid chromatographic (gel permeation chromatographic) separation and quantification of the N-trifluoroacyl derivatives. The method is linear in ranges typical of polymer compounding applications and offers a direct measurement of EBS and EBO without the need for prior extraction. The TFAA derivatives were isolated and characterized by infrared and direct-probe mass spectrometry.
ISSN:0021-9673
DOI:10.1016/S0021-9673(01)83321-5