探讨了密封微波消解罐中常用酸的升温时间、温度和压力的关系。在安全操作条件下,比较了几种混酸组合对0.5g固体样品的消解能力,优选出的混酸组合是HNO3-HF。采用程序升温的方法,探索了0.5g花岗岩固体样品的最短消解时间和100ml消解罐的最大消解能力,实验结果表明,可以在21min内完成0.5g粉末样品的完全消解,用100ml消解罐最多可以消解2.0g粉末固体样品。 The relationship between heating time, temperature and pressure of common acid in sealed microwave digestion tank was discussed. Under safe operating conditions, several combinations of mixed acids were compared for their ability to digest solid samples of 0.5 g. The preferred mixed acid combination is HNO3-HF. The method of program temperature was used to explore the shortest digestion time of 0.5g granite solid sample and the maximum digestion capacity of 100ml digestion tank. The experimental results show that digestion of 0.5g powder sample can be completed within 21min. 2.0 g powdery solid sample.