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- Title
电感耦合等离子体发射光谱(ICP-OES)法测定水泥熟料中铬的干扰研究.
- Authors
刘德金; 田荣; 吴思聪; 车敏; 黄勇
- Abstract
To improve the accuracy of determination of chromium in cement clinker by ICP-OES, spectral lines of Cr 205. 560 nm, Cr 267. 716 nm and Cr 283. 563 nm were selected in this study. According to the main elements (Fe, Al, Ca and Mg) of cement clinker content, single element interference tests with different concentrations were carried out. T he results show that iron has a large positive interference for Cr 283. 563 nm,calcium has a large negative interference for all three lines, the relative errors (RE) of them are more than ± 10 %, RE of the other are within ± 10 %, generally negative interference. Further linear regression analysis shows that there is a strong linear correlation between the interference and the concentration of interference elements except aluminum. It is found that the RE caused by interference is about -18%-11% by mulfrelement composite interference test, which is about 8%-10% different from the sum result of single element interference. T he actual sample detection results show that the actual interference is basically the same as the multi-element composite interference test. T he error of the determination results using Cr 283. 563 nm spectral line may be smaller, and the recoveries of the three spectral lines are similar,about 80%. After the recovery correction, the spectral lines of Cr 205. 560 nm and Cr 267. 716 nm are satisfactory, while Cr 283. 563 nm is low. T he matrix interference can be eliminated by matrix matching method with multi-element composite interference test solution as matrix. T he simplified matrix matching method with calcium solution as matrix is also effective, but only Cr 205. 560 nm and Cr 267. 716 nm can be used for spectral line. In this study,the interference was systematically studied and found the reason, a method to eliminate the interference was put forward, which improved the accuracy of determination of chromium,and provided a reference to solve related problems.
- Subjects
SPECTRAL lines; CEMENT clinkers; REGRESSION analysis; LINEAR statistical models; CHROMIUM
- Publication
Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue, 2022, Vol 12, Issue 4, p45
- ISSN
2095-1035
- Publication type
Article
- DOI
10.3969/j.issn.2095-1035.2022.04.007