Because of a disagreement in the literature, the standard molar enthalpy of formation of sulfur hexafluoride, Δ f H m o(SF 6, g, 298.15 K, has been redetermined by fluorine combustion calorimetry. The new value is in excellent agreement with an earlier result reported by the present author...
Characteristic parameters calculated from a relative molar mass (MM) signal of the airflow during the washout expiration phase are analyzed. The DTG-SBW signal is acquired by subtracting a reconstructed MM signal without tracer gas from the signal measured with an ultrasonic sensor during in- and ...
For the assessment of small airway diseases, a noninvasive double-tracer gas single-breath washout (DTG-SBW) with sulfur hexafluoride (SF6) and helium (He) as tracer components has been proposed. It is assumed that small airway diseases may produce typical ventilation inhomogeneities which can be...