Reasonable result could be obtained by using water as dispersion medium,and nonyl hydroxybenzene polyethoxylate ether as dispersant but ultrasonic treatment was not preferred.

• 结果表明,以水为分散介质、壬基酚聚氧乙烯醚为分散剂,不做超声处理,可获得令人满意的精对苯二甲酸粒度测定结果。