A Comparison of Nitrogen and Helium Purge Gas and Their Effect on Volatile Organic Compounds
Helium is the second most abundant element in the universe but makes up only 0.0005% of the earth’s atmosphere. Helium has many uses including cooling superconducting magnets for Nuclear Magnetic Resonance (NMR) or Magnetic Resonance Imaging (MRI), and since it is inert, it can also be used as a carrier gas for Gas Chromatography/Mass Spectrometry (GC/MS). During purge and trap concentration, Helium is used to purge volatile analytes out of the sample matrix in order to concentrate them onto an analytical trap. Due to the Helium shortage, it has become necessary to find another means of purging analytes out of the sample. This application will examine using Nitrogen as the purge gas for purge and trap sampling.
EST Analytical has been helping labs achieve their analytical goals for over 30 years. Our vision is to engineer reliable laboratory instruments that enable partners to make the world a better place.
To help labs excel we offer Application Notes across our entire product line. They are a resource that explains the technology, performance, and abilities of our products as used against certain methodologies and or applications.
Whether your needs center around a USEPA method, an ASTM Standard, or a sample matrix-based outcome EST has you covered. If you don’t see the technical direction you need, simply contact us. We also offer sample analysis in our onsite Applications Lab.