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| Successive Detemination of Lead and Zinc Contents in Lead Concentrates by EDTA Titration Method |
| Received:January 19, 2013 Revised:March 17, 2013 |
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| DOI：doi:10.3969/j.issn.2095-1035.2013.02.005 |
| KeyWord:EDTA;titrimetric method;lead concentrate;lead;zinc; proficiency testing |
| Author | Institution |
| YANG Liqin |
武警黄金地质研究所，河北 廊坊 |
| FENG Liang |
武警黄金地质研究所，河北 廊坊 |
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| Abstract: |
| A new EDTA titration method was established to successively detemine lead and zinc contents in lead concentrates. The samples were dissovled with hydrochloric acid, nitric acid, sulfuric acid and potassium chlorate. Lead was separated from other interfering elements by forming the lead sulfate precipitate, and the precipitate was dissolved in acetic acid - sodium acetate solution. By adding ammonia and potassium fluoride to the filtration solution, the interfering elements such as iron were precipated and thus separated from zinc containing solution. Xylenol orange was used as titration indicator, and EDTA was used to titrate lead and zinc in the solution, respectively. This method was used to determine the lead and zinc content in lead concentrate samples 10-1 and 10-2 which are designated for the NILPT(2010)-0211 Proficiency Testing. The results are satisfactory. |
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