1引言海洋和河流沉积物样品常用的前处理方法是加酸加热消解，不但费时且易引起沾污和被测组分的损失。悬浮液进样能够克服上述缺点。但一般的电磁搅拌存在搅拌不够均匀，特别是对沉积物一类样品，搅拌停止后会出现较大的固体颗粒下沉的现象。本文使用普通的超声清洗器作为搅拌 1 Introduction Commonly used pretreatment methods for marine and river sediment samples are heating and digestion with acid, which is not only time-consuming but also liable to cause contamination and loss of the measured components. Suspension sampling can overcome the above shortcomings. However, the general existence of electromagnetic stirring uniform mixing, especially for a sample of sediment, mixing stopped after the larger solid particles sink phenomenon. This article uses a conventional ultrasonic cleaner as a stirrer