The following table summarizes the typical relative abundances of the air and water background with no significant leaks in the vacuum system or GC carrier gas system and no Helium carrier gas contamination. The ratio of Nitrogen to O xygen should be ~ 4:1 representing their relative proportions in ambient air. Water background is at m/z 18. This article demonstrates a systematic procedure to diagnose and troubleshoot a higher than normal air background.Īir and Water background will always be present in the GC/MS vacuum system.Īir background is at m/z 28 (Nitrogen) and m/z 32 (Oxygen). High-quality GC/MS data requires a low, and stable background of air and water present in the MS analyzer.
This Information Applies To: 59 GC/MS systems with MassHunter Acquisition software
0 kommentar(er)
