APPLICATION OF ASCORBIC ACID IN THE TITRATION OF LEAD OF COMPLEX LEAD-CONTAINING MATERIALS
The lead content in lead concentrate was determined and the traditional lead determination method was im-proved based on the EDTA titration method.The interference of Fe3+on the titration endpoint was analyzed by comparing the addition of different ascorbic acids.After the improvement of the method,the standard deviation decreased from 79%to 4%,and the relative standard deviation decreased from 4.46%to 0.2%.Early addition of ascorbic acid in the formation of lead sulfate can effectively mask Fe3+,and the titration end point is obvious and stable.The improved measurement method is easy to operate and the measurement results are accurate and reliable,which has certain guiding significance for actual produc-tion.
万方数据
维普
