Temperature calibration of a mass spectrographic evolved gas analysis system

摘要: Abstract Because of the vacuum used in mass spectrographic evolved gas analysis, usual effects temperature lag between actual and apparent sample temperatures are exaggerated. Factors contributing to this difference discussed. The melting point various metals range 110–1100°C obtain insights estimates regarding these discrepancies at different heating rates, utilizing a variety holders. In general, if is good contact with heated supporting surface, agreement observed reported equilibrium rates ⩽ ∼ 20°C min. At higher differences become larger (⩾10°C) effect increases increasing melting. For holders which not sample, hot spots can develop high due unequal thermal radiation. Under circumstances be considerably lower than less dependent upon rate.