The cobalt is quantitatively dissolved by using ammonium hydrofluoride and citric acid as selecting optimum dosage of leaching reagents, time and temperature, etc. determined by AAS.

• 实验过程中对浸取剂的用量、水浴时间、温度等影响因素进行了正交实验设计,选出了最佳的浸取条件。