Abstract：The sample was fused in nickel crucible at 550 ℃ for 15 min using sodium peroxide-sodium hydroxide as mixed flux. After leaching with hot water and acidification with hydrochloric acid, the iron was precipitated in ammonia medium for the separation from zinc, copper and nickel. The precipitation was dissolved with hydrochloric acid, and the pH of solution was controlled at 1.1-1.4. Then, the content of iron in solution was titrated with EDTA standard solution at 70-80 ℃ using sulfosalicylic acid as indicator. The determination method of iron in regenerated zinc raw material by EDTA titration method was established. The interference tests showed that the coexisting elements in sample after precipitation separation did not interfere with the determination of iron. The proposed method was applied to the determination of iron in regenerated zinc raw material sample. The relative standard deviations (RSD, n=11) were between 0.22% and 1.2%. After treatment by alkali fusion, the content of iron in sample was determined by EDTA titration method and potassium dichromate titration method. The found results of two methods were consistent.
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