一种新型密度计及水、丙酮、4-甲基-2-戊酮(MIBK)三元混合物的密度测定

A New Density Meter and the Density Measurement of Water-Acetone 4-Methyl-2-Pentanone (MIBK) Ternary Mixture

我们设计了一种小型密度计,它用螺旋测微计作体积置换泵,可测到3×10^(-4)mL的体积变化.实验时仅需8mL样品便可精确测定各温度下的密度,其精度≤2×10^(-4)g/mL而且操作简单,用该装置测定了293.15—323.15K水、丙酮、MIBK及相应的二元、三元体系的液体密度,并进行了关联.

A new density meter was designed and the screw micrometer was used as a volume exchange pump to measure the change of liquid volume. It can measure the volume of 3×10^(-4)mL, and needs only 8 mL sample to accurately measure the densities at different temperatures. The meter is very simple, however, it gives a high accuracy, 2×10^(-4) g/ mL. 'With this meter, the liquid densities of water, acetone, MIBK and the corresponding binary and ternary mixtures were measured over 293.15-323.15 K.