A method for estimating temperature variation due to pressure drop in a mobile phase passing through a column in a high efficiency chromatographic separation system is provided. The method includes constructing a temperature triangle using a pressure-temperature thermodynamic plot of the mobile phase having isenthalpic curves of the mobile phase. Applications of the method include development of chromatographic methods for minimizing band broadening due to temperature variation and methods to mitigate the extent of temperature variation due to the pressure drop.