Qualitative and quantitative analysis method for sulfur hexafluoride (SF6) gas discharge decomposition product

The invention discloses a qualitative and quantitative analysis method for a sulfur hexafluoride (SF6) gas discharge decomposition product. The method comprises the following steps of: sampling; performing qualitative and quantitative analysis on a sample by a gas chromatograph-mass spectrograph, wherein a quadrupole rod quality detector is adopted, and a chromatographic column is a CP-Sil 5 CB capillary column. Compared with the prior art, the method can be used for detecting decomposition components comprehensively, detecting eight components including CF4, C2F6, CO2, SO2F2, SOF4, SOF2, SO2 and H2S synchronously, and performing fast recognition and accurate quantitative analysis on the compound. The detection on the SF6 decomposition product assists in an operator to know the insulating state inside electrical equipment so as to judge failure causes accurately.