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Characterization of a Mini Membrane Inlet Mass Spectrometer for On‐site Detection of Contaminants in Both Aqueous and Liquid Organic Samples by Christian Janfelt; Helle Frandsen; Frants R. Lauritsen is a Chemistry article available to read on EtoBox.

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## Abstract A mini membrane inlet mass spectrometer (mini‐MIMS) of a total weight of 12 kg was constructed using a miniature Multipole mass spectrometer, a small vacuum system and a flexible flat sheet membrane inlet, where the exposed membrane area can be changed by a factor of 80. The variable membrane area together with the possibility of operating the Multipole at pressures up to 1 × 10^−3^ Torr made it possible to test the system with three microporous membranes (cellulose, polyether sulfone and polypropylene) normally not compatible with standard electron ionization MIMS systems and a standard non‐porous polydimethylsiloxane membrane. We found that the hydrophilic cellulose and polyether sulfone membranes had selectivity characteristics opposite to those of the standard silicone membrane. They demonstrated preferential detection of hydrophilic compounds in hydrophobic organic solvents, whereas the silicone membrane preferentially detects hydrophobic organic compounds in aqueous solution. Using the cellulose membrane, organic contaminants and water could be detected in organic solvents at 10–100 ppm levels by weight, the relative high detection limits primarily caused by inter

Who reads Characterization of a Mini Membrane Inlet Mass Spectrometer for On‐site Detection of Contaminants in Both Aqueous and Liquid Organic Samples?

Author

Christian Janfelt; Helle Frandsen; Frants R. Lauritsen

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0951-4198)

Published

2006

Language

EN

Field

Chemistry (Physical Sciences)