Starts with the occurrence and the test of SF6 arc decomposition product, through analyzing the concrete example, puts forward the methods and measures of using the content of SO2 and H2S to diagnose the internal failure of SF6 electrical equipment.

The electrolytic products are hard to be removed from machining gap in micro-ECM(electrochemical machining) process,which may lower machining speed or stop the machining process.

The electrolytic products are hard to be removed from the small machining gap in micro ECM(electrochemical machining) process,which decrease the machining efficiency,stability and quality.

The decomposed products of trichlorfon in gas chromatographic analysis were identified by mass spectrometry(MS).

The research development of SF6 partial discharge mechanism is reviewed,the most popular methods of proximate analysis are introduced,such as gas phase chromatography,gas sensors,infrared absorption spectroscopy and optoacoustic spectroscopy,the future development of proximate analysis of SF6 s decomposed products under partial discharge is forecast,and the SF6 decomposed products are analyzed.

The mass spectrometry (MS) and the liquid nuclear magnetic resonance spectroscopy (NMR) were employed to confirm the structure of JGB decomposed product A.