Abstract
Classical vaporization methods such as transpiration and Knudsen or Langmuir effusion have been limited because they do not establish the molecular identity of transport species or because low pressures are necessary to make effusion measurements. We have developed a new technique—Transpiration Mass Spectrometry (TMS)—that overcomes both of these limitations by combining the basic features of transpiration and molecular beam mass spectrometry. With this technique, it is possible to sample reactive gases directly from high-temperature (to 1500 °C), high-pressure (to 10 atm) atmospheres for quantitative characterization with a mass spectrometer. The accuracy of thermochemical data obtained by the TMS method is competitive with that of established lower dynamic range techniques. Examples of application to vaporization of complex silicate slags, glasses, and minerals are considered. Implications and precautions resulting from cooling effects during the sampling process are also discussed.
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Hastie, J.W., Bonnell, D.W. (1984). Transpiration Mass Spectrometry—A New Thermochemical Tool. In: Ribeiro da Silva, M.A.V. (eds) Thermochemistry and Its Applications to Chemical and Biochemical Systems. NATO ASI Series, vol 119. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-6312-2_10
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DOI: https://doi.org/10.1007/978-94-009-6312-2_10
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