Xu, Sihang published the artcileIdentification of alkylpyrazines by gas chromatography mass spectrometry (GC-MS), Safety of 2,3,5-Trimethylpyrazine, the main research area is alkylpyrazine gas chromatog mass spectrometry; Gas chromatography; Mass spectrometry; Pyrazines; Retention indices; Stationary phases.
Pyrazines are an important group of natural products widely used as food additives and fragrants. Gas chromatog.-mass spectrometry (GC-MS) is the most widely applied anal. technique for characterization of alkylpyrazines. However, mass spectra of many positional isomers of alkylpyrazines are very similar. Consequently, an unambiguous identification of each positional isomer by spectral interpretation or database search protocols is practically unfeasible. In fact, there are many misidentifications in literature. To identify alkylpyrazines, chemists often resort to gas chromatog. retention indexes (RIs). Although there are many compilations of retention indexes of alkylpyrazines, these databases are often incomplete and the values reported are sometimes inconsistent. Herein, the authors present retention indexes of fifty-six alkylpyrazines recorded on DB-1, ZB-5MS, DB-624, and ZB-WAXplus stationary phases, and compare them with those available in the NIST-2017 MS-RI database. Furthermore, RI values can be used, together with mass spectral interpretations, to identify certain alkylpyrazines gas chromatog. mass spectrometry.
Journal of Chromatography A published new progress about Gas chromatography-mass spectrometry. 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Safety of 2,3,5-Trimethylpyrazine.