Analysis and characterization of naphthenic acids by gas chromatography–electron impact mass spectrometry of tert.-butyldimethylsilyl derivatives

Autor:	Sarah A. Green, Gary D. McGinnis, Jagdish Rughani, Wayne P. St. John
Rok vydání:	1998
Předmět:	Chemical ionization Degree of unsaturation Chromatography Molecular mass Chemistry Organic Chemistry Analytical chemistry General Medicine Mass spectrometry Biochemistry Analytical Chemistry chemistry.chemical_compound Naphthenic acid Gas chromatography Derivatization Electron ionization
Zdroj:	Journal of Chromatography A. 807:241-251
ISSN:	0021-9673
DOI:	10.1016/s0021-9673(98)00085-5
Popis:	The renewed interest in naphthenic acid (NA) as a wood preservative has driven the need for analytical techniques to characterize commercial supplies of NA. The compositional heterogeneity of NA makes analytical characterization extremely difficult. Fluoride ion chemical ionization mass spectrometry (FI-MS) has proven to be an effective technique in NA characterization. However, FI-MS is very complicated and expensive to perform. In this paper, an alternative to the FI-MS technique is presented which offers similar results with a more widely available bench-top electron impact (EI) mass spectrometer. By derivatization of NA components to their tert. -butyldimethylsilyl analogs, the extent of molecular fragmentation is greatly decreased and strong base peaks representing the unfragmented NA constituents are obtained in the EI spectra. Molecular mass and tentative structures can be deduced based on sites of unsaturation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::72f52c60821d4ad5e1ebe9f41c9daee1 https://doi.org/10.1016/s0021-9673(98)00085-5 Zobrazit plný text záznamu Full Text from ScienceDirect