The high content cobalt in some electronic materials and products like CoC_2O_4,CoCl_2 and LiCoO_2 would interfere the determination of low content iron.

• 对电子化工原料及产品草酸钴、氯化钴、钴酸锂中的铁进行测定；基体中高含量的钴对铁(约0.；001%25)的测定造成了干扰。