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1 Types of Mass Spectrometers Transmission quadrupole Time-of-Flight Quadrupole ion-trap (Ion Mobility Spectrometer)
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2 Time-of-Flight 5000V m/z accuracy: ~0.001. High acquisition rate: 100-10000 spetra/s Can measure high mass: 1M amu Require ultra high vacuum: 10 -12 bar
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3 Ion Mobility
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Uses Airports – screen for explosives Uses positive and negative ion modes in the detection of explosives, drugs and chemical weapons Pharmaceutical industry – cleaning validations Detection of atmospheric pollutants
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http://www.sandia.gov/mstc/technologies/microsensors/IMS.html http://www.afcintl.com/gasdet/rae
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Unformatted text preview: /chemrae.htm http://www.airport-int.com/categories/nbc-and-trace-explosive-protection/egis-defender.asp http://www.pmeasuring.com/support/papers/m olecularmonitoring/cleanroom/App54/viewHtml ?gclid=CN3qioSe4ZICFRFBFQod_CHB_w 8 Chromatography- Mass Spectrometry http://www.chem.agilent.com/cag/other/Multimode_Source_384k.wmv 9 Chromatogram of herbicides spiked into river water at ppb level Selected Ion Monitoring 10 11 ImazaquinH + Triple Quadrupole Mass Spectrometer Tandem Mass Spectrometer (MS/MS) Product-ion spectra...
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