Thermal decomposition of vitamin C: An evolved gas analysis−ion attachment mass spectrometry study

► We studied the real time non-isothermal decomposition of vitamin C. ► Evolved gas analysis−ion attachment mass spectrometry (EGA−IAMS) was utilised. ► We could observe dehydro-l-ascorbic acid as a decomposition product for the first time. ► Our results were compared with those obtained by pyrolysis-GC−MS. ► Quantitative and qualitative differences between the products were found.