Measurement Method of Compressibility Coefficient for Tridecane with a Vibrating Tube Densimeter

Abstract

Tridecane is commonly used as working liquid for measurement of the volume of solids in hydrostatic weighing apparatuses. The accurate measurement on the compressibility coefficient of tridecane plays an important role in this process. A new method based on a commercial vibrating densimeter(DMA-5000) is developed in order to determine the compressibility coefficient of tridecane with high measurement accuracy. The compressibility coefficient is calculated by using the data of pressure difference and corresponding density measured by the vibrating densimeter. Highly pure water and air were used for calibration of the vibrating densimeter. The compressibility coefficient of tridecane has been measured in the additional pressure range between 0MPa and 0.1MPa and in the temperature range from 283.15K to 303.15K.