Indicates the viscosity of the eluent (in cP) at the given solvent composition and temperature.
When acetonitrile is selected as the organic modifier, the eluent viscosity is calculated by the following equation, reported in Chen, H.; Horvath, C. Anal. Methods Instrum. 1993, 1, 213-222.
When methanol is selected as the organic modifier, the eluent viscosity is calculated by the following equation, based on data reported in Billen, J.; Broeckhoven, K.; Liekens, A.; Choikhet, K.; Rozing, G.; Desmet, G. J. Chromatogr. A 2008, 1210, 30-44.
where
η = eluent viscosity (cP)
T = temperature (°C)
Φ = volume fraction methanol
The eluent viscosity is useful for calculating the backpressure and the average diffusion coefficient.