also obtained DD Isotherms at several different
flow rates and found air flow rate to have an influence on the
RHc value. This would suggest that RHc is time dependent. The
relationship between RHc and DDI flow rate was fairly linear, so
they used regression analysis to extrapolate and predict RHc at a
flow rate of zero (RHc0). They used both RHc and RHc0 for further
comparisons. They also compared various methods of finding the
inflection point and found that the Savitzky–Golay