Method for determining indium content in indium-containing material such as residual target by EDTA titration method

The invention relates to a method for determining the content of indium in a residual target by an EDTA titration method. In the presence of a large amount of tin and interference elements such as bismuth, iron, copper, zinc and lead, tartaric acid and glacial acetic acid are used as masking agents, the pH is controlled to be 3 with an ammonia water solution, the temperature is controlled to be 50-80 DEG C, the influence of the interference elements on an end point is eliminated, and the content of indium in a residual target is determined with an EDTA titration method. The method is simple and easy to operate, the precision and result accuracy of the detection method are good, the method is quite suitable for detecting the indium content in the residual target, the cost is low, expensiveequipment is not needed, a large amount of detection equipment does not need to be purchased additionally, and an accurate result can be obtained through one-time analysis regardless of the indium content of a sample. 本发明涉及一种