Determination of Chromium Oxide in Chrome Ores by Automatic Potentiometric Titrimetry with Microwave Digestion Sample Preparation
详细信息
- 责任者：Hu Dexin (Mineral and Metallic Materials Inspection Center ; Tianjin Entry-Exit Inspection and Quarantine Bureau ; Tianjin 300456 ; China) ; Ma Deqi
- 刊名：Rock and Mineral Analysis
- 出版年：2011
- 卷期：30(1)
- 关键词：铬矿 ; chromium ores ; 滴定法 ; titration methods ; 电位法 ; potentiometry
- 页码：p.83-86
- 图表：1 illus., 3 tables, 20 refs.
- 分类号：0900
- issnNo：ISSN0254-5357
- isbnNo：CN11-2131/TD
摘要
A method for the determination of Cr2O3 in chrome ores by automatic potentiometric titrimetry technology coupled with microwave digestion under high-pressure was developed. The method has been tested by determination of Cr2O3 in 2 National Standard Reference chrome ore samples with wide range of Cr2O3 contents. The results were in agreement with certified values with relative error of 0.015%～0.021% and the precision of 0.089%～0.102% RSD (n=20). Six imported inspection samples were also tested by the method and the results were in accordance with those from classical method. The method provides the advantages of low energy consumption, low labor intensity, high efficiency and is suitable for the daily inspection work.