| 光谱学与光谱分析 |
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| Determination of Fe, Ti and V in Vanadium and Titanium Magnetite by ICP-OES and Microwave-Assisted Digestion |
| ZHU Xia-ping1，YIN Ji-xian2，CHEN Wei-dong2，HU Zi-wen1，LIANG Qing-xun1，CHEN Tie-yao1 |
1. Institute of Material & Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
2. Department of Mine Inspection, Guangzhou Entry-Exit Inspection and Quarantine Bureau, Guangzhou 510623, China |
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Abstract The method of determination of iron, titanium and vanadium in indissolvable vanadium and titanium magnetite has been established by inductively coupled plasma atomic emission spectroscopy through adding the complexant A and using microwave-assisted digestion. The optimal conditions are confirmed by orthogonal experiment: 0.1 g vanadium and titanium magnetite, 0.04 g complexant A, 12 mL concentrated HCl, 10 min digestion time, and 385 W microwave power. The newly-established method has been applied to digest vanadium and titanium magnetite of Panzhihua Iron and Steel Institute (GBW07226). The iron, titanium and vanadium were detected by ICP-OES, and both comparative error (Er%) and comparative standard deviation (RSD%) met the demand of analytical chemistry, and the complexant A can significantly accelerate the dissolution of vanadium and titanium magnetite through the complexation with the dissolved metal ions, and making the surface of sample and hydrochloric acid medium to update constantly. The determination of the main and trace elements of digestion solution at the same time was achieved by ICP-OES. The method has the advantages of less use of reagents, economy, rapidness, and being friendly to environment, and it meets the requirement for rapid and volume determination. So the method has the value of practical application for the entry-exit inspection and quarantine department of the state and other relevant inspection units.
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Received: 2009-05-10
Accepted: 2009-08-20
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Corresponding Authors:
ZHU Xia-ping
E-mail: zhuxiaping@cdut.edu.cn
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