采用微波干燥法测定五水硫酸铜中的结晶水,确定了最佳的微波干燥条件,试样2g左右,功率720W,恒重时间8min;功率540W时,恒重时间只需12min.和传统的方法相比,具有快速、准确度高、操作方便、节约用电等优点,该法也可推广应用于其他重量分析法. The microwave drying method was used to determine the crystal water in copper sulfate pentahydrate, and the optimum microwave drying conditions were determined. The sample was about 2g, the power was 720W, the constant weight time was 8min and the constant weight time was only 12min when the power was 540W. Compared with the method, the method has the advantages of fastness, high accuracy, convenient operation and electricity saving, and the method can also be widely applied to other gravimetric methods.