本方法用于测定分子筛的填充表观体积密度（ABD）。表观体积密度是一个经验值，定义为每单位体积的质量，包括颗粒之间的空隙，报告为克每毫升（g/mL）。

This method is for determining the packed apparent bulk density (ABD) of molecular sieves on an as-received basis. Apparent bulk density is an empirical value defined as mass per unit volume, which includes the void spaces between the particles, and is reported as grams per milliliter (g/mL).