text: with:
  *σ is surface tension of the mixture
  *σ is surface tension of pure water 
  *a is component specific constant (see table below)
  *x is mole fraction of the solvated component
  The equation can be rearranged to be explicit in a:
  This allows the direct calculation of that component specific parameter a from experimental data.
  The equation can also be written as:
  with:
  *γ is surface tension of the mixture
  *γ is surface tension of pure water
  *R is ideal gas constant 8.31 J/(mol*K)
  *T is temperature in K
  *ω is cross-sectional area of the surfactant molecules at the surface
  The surface tension of pure water is dependent on temperature. At room temperature (298 K), it is equal to 71.97 mN/m