The disturbed elements as W, Mo, Ti are separated from solution onetime by the method of separated solid from liquid, EDTA-H_2O_2 conjoint reacting and BeSO_4 is used as carrying settle.

• 以硫酸铍为沉淀载体,用EDTA-H_2O_2为络合剂,采用固液分离等手段,消除基体以及其中大量钨、钼、钛对锡测定的干扰。