Ultra-low bleed silicones for septa promote analytical purity and prevent ghost peaks on chromatographs. To avoid septum bleed, Specialty Silicone Products (SSP) uses only platinum-cured silicones. When requested, a batch of septa can be analyzed in our QC Lab by GC-MS and a copy of the test report can be sent with your order. 

Siloxane Contamination 

By removing excess siloxanes, SSP reduces potential contaminants that could show up in mass spectrometry (MS) during gas chromatography (GC) or liquid chromatography (LC). If samples become contaminated with siloxanes during GC/MS or LC/MS, laboratory technicians may struggle to interpret the test results. Siloxane buildups can also coat the MS source and require cleaning. 

EPA/VOA Testing 

Ultra-low bleed silicones from SSP support the accuracy of volatile organic analysis (VOA), a series of laboratory techniques for identifying and measuring volatile organic compounds (VOCs). VOCs include a variety of chemicals, some of which have adverse effects upon human health. Typically, VOCs are the object of inquiry during EPA/VOA testing. 

Analytical Purity 

During soil and water testing, it’s especially important to avoid septa that can introduce contaminants such as siloxanes, fluorinated compounds, acetones, and various solvents. Otherwise, the septa may introduce the very contaminants for which VOA is searching. By choosing ultra low-bleed septa from SSP, you can minimize contamination risks and protect the analytical purity of samples..