Membrane introduction mass spectrometry
- Membrane introduction mass spectrometry
Membrane introduction mass spectrometry (MIMS) is a method of introducing analytes into the mass spectrometer's vacuum chamber via a semipermeable membrane.[cite journal |author=Johnson RC, Cooks RG, Allen TM, Cisper ME, Hemberger PH |title=Membrane introduction mass spectrometry: trends and applications |journal=Mass spectrometry reviews |volume=19 |issue=1 |pages=1–37 |year=2000 |pmid=10715830 |doi=10.1002/(SICI)1098-2787(2000)19:1<1::AID-MAS1>3.0.CO;2-Y] ][cite journal |author=Demeestere K, Dewulf J, De Witte B, Van Langenhove H |title=Sample preparation for the analysis of volatile organic compounds in air and water matrices |journal=Journal of chromatography. A |volume=1153 |issue=1-2 |pages=130–44 |year=2007 |pmid=17258752 |doi=10.1016/j.chroma.2007.01.012] Usually a thin, gas permeable, hydrophobic membrane is used, for example polydimethylsiloxane. Samples can be almost any fluid including water, air or sometimes even solvents. The great advantage of the method of sample introduction is its simplicity. MIMS can be used to measure a variety of analytes in real-time, with little or no sample preparation. MIMS is most useful for the measurement of small, non-polar molecules, since molecules of this type have a greater affinity for the membrane material than the sample. ]ee also
*Atmospheric pressure chemical ionization
*Liquid chromatography-mass spectrometry
References
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