Determination of hydrogen gas by 1,4-bis(phenylethynyl)benzene hydrogenation coupled with gas chromatography-mass spectrometry

Knowing the H 2 concentration released from polymer materials is essential to understand the degradation degree of polymer materials. In this study, a novel strategy of 1,4-bis(phenylethynyl)benzene (DEB) hydrogenation in combination with gas chromatography - mass spectrometry (GC-MS) determination of hydrogen gas (H 2 ) was developed. In this strategy, DEB was utilized to react with H 2 for establishing the quantitative analysis method of H 2 . A H 2 analysis platform that could accurately control H 2 concentration was designed and fabricated to be used to establish the quantitative method of H 2 . The linear regression curve was established between the H 2 standard and the MS signal of the reaction products on GC-MS. Finally, the H 2 released from polyethylene under gamma radiation was detected by this method. This method could be a powerful auxiliary tool for studying the content changes of H 2 .