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ATMOSPHERIC PRESSURE LASER-INDUCED ACOUSTIC DESORPTION CHEMICAL IONIZATION FOR GLOBAL HYDROCARBON ANALYSIS
ATMOSPHERIC PRESSURE LASER-INDUCED ACOUSTIC DESORPTION CHEMICAL IONIZATION FOR GLOBAL HYDROCARBON ANALYSIS
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机译:大气压力激光诱导的声吸附化学电离,用于全球油气分析
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摘要
Systems, devices, and methods, operational at atmospheric pressure, involving a conical member having an outlet positioned relative to an inlet of a mass spectrometer inlet capillary; a tungsten electrode positioned between the conical member and the inlet of the mass spectrometer inlet capillary; a foil membrane disposed within the conical member, the foil membrane having a first surface, and a second surface opposed to the first surface; a laser directing laser pulses at the second surface of the foil membrane to create a shockwave to vaporize one or more analytes deposited on the first surface; a reagent gas inlet stream positioned relative to the foil membrane to pass a reagent gas across the foil member to transport vaporized analytes: away from the foil membrane, through the outlet of the conical member, through a corona discharge generated by the tungsten electrode, and into the inlet capillary of a mass spectrometer.
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