# Buoyant molecular weight

Sednterp will calculate the buoyant molecular weight of the sample according to the method chosen for calculating the molecular weight. The buoyant molecular weight is defined in equation 6:

Equation 6.

If the molecular weight is computed from σ, then the buoyant molecular weight is computed from σ also.

If the molecular weight is entered directly, or if it is calculated from composition, the buoyant molecular weight is computed from its definition in equation 6 using the values for vbar and ρ from the current buffer.

See also: Calculating the Molecular Weight.