光谱学与光谱分析 |
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Fast Analysis of Benzene Concentration in Gasoline Based on Low-Resolution Dispersive Raman Spectroscopy |
LIN Yi-ling, DAI Lian-kui*, RUAN Hua |
State Key Lab of Industrial Control Technology, Zhejiang University, Hangzhou 310027, China |
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Abstract In order to fast analyze the benzene concentration in gasoline, a new measure method based on low-resolution dispersive Raman spectroscopy is proposed. There exist strong measurement noise and fluorescence background in dispersive Raman spectra, so the present paper applies the Savitzky-Golay smoothing filter to remove the measurement noise and uses iterative polynomial curve-fitting to reduce the fluorescence background. Based on ridge regression, principal component regression and partial least squares algorithm, three calibration models of the benzene concentration in gasoline are built and validated by a set of gasoline samples from a refinery. Experimental results show that their repeatability and reproducibility can satisfy the accuracy requirement specified by the standards SH/T0713-2002, regardless of applying what kind of calibration models. In addition to its low cost, small size, convenience to use and so on, the fast measure method based on low-resolution dispersive Raman spectroscopy can be widely applied to the routine analysis.
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Received: 2010-01-10
Accepted: 2010-04-20
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Corresponding Authors:
DAI Lian-kui
E-mail: lkdai@iipc.zju.edu.cn
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[1] GB 17930—2006, Standard of Gasoline for Motor Vehicles (《车用汽油》标准). [2] SH/T0713—2002 Standard Test Method for Determination of Benzene and Toluene in Finishedmotor and Aviation Gasoline by Gas Chromatography(车用汽油和航空汽油中苯和甲苯含量测定法(气相色谱法)). [3] LU Wan-zhen(陆婉珍). Modern NIR Infrared Spectroscopy Analytical Technology(现代近红外光谱分析技术). Beijing: China Petrochemical Press(北京:中国石化出版社), 2006. 44. [4] XU Guang-tong, SHEN Shi-kong, LU Wan-zhen, et al(徐广通,沈师孔,陆婉珍,等). Petroleum Processing and Petrochemicals(石油炼制与化工), 2001, 32(6): 51. [5] SHAO Bo, HUANG Xiao-ying, WANG Jing-hua(邵 波,黄小英,王京华). Petrochemical Technology(石油化工), 2002, 31(10): 848. [6] WEN Huan, ZHONG Shao-fang, HU Jiang-yong, et al(闻 环,钟少芳,胡江涌,等). Chinese Journal of Spectroscopy Laboratory(光谱实验室), 2008, 25(4): 621. [7] CHU Xiao-li, YUAN Hong-fu, LU Wan-zhen(褚小立,袁洪福,陆婉珍). Modern Scientific Instruments(现代科学仪器), 2006, (3): 8. [8] Cooper J B, et al. Applied Spectroscopy, 1997, 51(11): 1613. [9] Clarke R H, Londhe S, Womble M E. Spectroscopy, 1998, 13(10): 28. [10] Clarke R H, Londhe S, Premasiri W R, et al. Journal of Raman Spectroscopy, 1999, 30: 827. [11] Mazet V, Carteret C, Brie D, et al. Chemometrics and Intelligent Laboratory Systems, 2005, 76: 121. [12] Lieber C A, Anita Mahadevan-Jansen. Applied Spectroscopy, 2003, 57: 1363. [13] NI Yong-nian(倪永年). Application of Chemometrics in Analytical Chemistry(化学计量学在分析化学中的应用). Beijing: Science Press(北京: 科学出版社), 2004. 96. [14] Cooper J B. Chemometrics and Intelligent Laboratory Systems, 1999, 46: 231. [15] BAO Xin, DAI Lian-kui(包 鑫, 戴连奎). Chinese Journal of Analytical Chemistry(分析化学), 2008, 36: 71.
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