Concentrated injection method for the improved sensitivity in detecting the decomposed products of SF6

[摘要] A concentrated injection method for detecting SO2, H2S, SO2F2 and SOF2 in sulfur hexafluoride (SF6) based on Gas Chromatography-Mass Spectrometer (GC-MS) measurements has been proposed and developed. The peak intensity of the component obtained by concentrated injection method for detecting 1 μL/L SO2 was 20 times larger than that estimated by ordinary injection method, indicating a higher sensitivity, and a lower detection limit as well. This work shows advantages for the pre-warning of pitfall in electrical equipment, and effectively improves the safety and reliability of the grid.

[发布机构] Electric Power Research Institute, Guangxi Power Grid Co. Ltd., Nanning, Guangxi; 530023, China^1

[效力级别] 无线电电子学

[关键词] Electrical equipment;Gas chromatography-mass spectrometers;Injection method;Lower detection limit;Peak intensity