国家标准GB15063-2001《复混合肥料》中规定的方法是通过沸水提取复混肥料样品中水溶性的钾。沸水提取过程需要30 min,再冷却至室温,转移入容量瓶中定容。这个过程至少需要1 h。超声波法是利用超声波的空化效应,使液体微粒间发生高速激烈碰撞,将复混肥料样品中的钾快速地从样品中分离溶解于水中,提取时间只需5 min,而且不需要冷却,比传统提取方法大大缩短了时间。 National standard GB15063-2001 “compound fertilizer” in the provisions of the method is to extract water by boiling water compound fertilizer samples of potassium. Boiling water extraction process takes 30 min, then cooled to room temperature, transferred to a volumetric flask transferred to volume. This process requires at least 1 h. Ultrasound is the use of ultrasonic cavitation effect, the liquid particles in high-speed fierce collision between the compound fertilizer samples quickly separated from the sample dissolved in water, the extraction time is only 5 min, and does not require cooling, than the Traditional extraction method greatly shorten the time.