在催化剂、载体以及一些固体样品的研究中,都要测定其真实密度,以了解样品的物性结构,如比孔容、孔半径和孔隙率等。但是,由于这些固体样品,一般都存在有微细的孔道和裂缝,从而使得测定较为困难,与常用的液体样品的密度测定法相比,要麻烦得多.有些文献[1,2]曾介绍采用溶剂(水或有机液体)置换测定样品密度的方法,但是在某种情况下,由于使用的溶 In the study of catalysts, supports and some solid samples, the true density should be determined to understand the physical properties of the sample, such as specific pore volume, pore radius and porosity. However, due to the presence of fine pores and cracks in these solid samples, which makes the determination difficult, it is much more cumbersome than the usual densitometry of liquid samples.Some literature [1,2] introduced the use of solvents (Water or organic liquid) replacement method of determining the density of the sample, but in some cases due to the use of the solution