| 光谱学与光谱分析 |
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| Determination of Silicon in Gasoline by Directly Measuring under Organic Phase Using Inductively Coupled Plasma Optical Emission Spectroscopy |
| ZHANG Wen-mei1, WEN Huan1*, Lü Huan-ming2, LIU Hui-qin1, LIN Zhi-sheng1, WANG Rong-hua1 |
1. National Quality Supervision & Testing Center for Petroleum and Petrochemical Products (Guangdong), Huizhou 516003, China
2. National Quality Supervision & Testing Center for Petroleum Products (Shenyang), Shenyang 110032, China |
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Abstract A simple and accurate method was developed for determining silicon in gasoline using inductively coupled plasma optical emission spectroscopy (ICP-OES). For sample inroduction a Burgener nubulizer and a Cyclonic spray chamber were used. A gasoline sample was diluted with isooctane and then introduced into the cooled spray chamber of the ICP-OES. Good linearity was achieved in the silicon concentration range 0.1～10.0 mg·kg-1, and the correlation coefficient was 0.999 96. The detection limit for silicon was 0.012 mg·kg-1 and thesilicon recoveries from gasoline samples were 95.8%～98.4%, with relative standarddeviations of less than 3.0%. The method was proved to be simple, reliable andhighly sensitive, and suitable for determining silicon in samples of motor gasoline, ethanol-gasoline and methanol-gasoline fuel mixtures those containing not more than 15% (V/V) oxygenates.
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Received: 2014-03-10
Accepted: 2014-06-15
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Corresponding Authors:
WEN Huan
E-mail: wenhuan0707@163.com
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