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Chin. Opt. Lett.
 Home  List of Issues    Issue 11 , Vol. 09 , 2011    10.3788/COL201109.110010


Diffusion interaction and quantitative analysis of zinc dialkyldithiophosphate content in lube base oils in terahertz regime
Lu Tian1;2, Kun Zhao2, Qingli Zhou3, Yulei Shi3, Dongmei Zhao3, Cunlin Zhang3, Songqing Zhao2
1 State Key Laboratory of Heavy Oil Processing, [China University of Petroleum], Beijing 102249, China
2 Laboratory of Optical Sensing and Detecting Technology, [China University of Petroleum], Beijing 102249, China
3 Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, [Capital Normal University], Beijing 100048, China

Chin. Opt. Lett., 2011, 09(11): pp.110010

DOI:10.3788/COL201109.110010
Topic:Spectroscopy, imaging, and sensing using terahertz radiation
Keywords(OCIS Code): 070.4340  160.4760  190.4400  300.6495  

Abstract
We investigate the diffusion interaction and quantitative analysis of zinc dialkyldithiophosphate (ZDDP) mixed with lube base oil (LBO) at different concentrations using terahertz time-domain spectroscopy (THz-TDS). When the concentration exceeds 6.78%, the characteristic absorption peaks exhibit significantly shift, and the absorption coefficient peak value is nonlinear against concentration. Moreover, the absorption coefficients of mixed samples follow the Beer's law at a concentration below 6.78%. The quantitative analysis enables a strategy for monitoring the formulation of lubricating oil in real time.

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Received:2011/5/17
Accepted:2011/8/10
Posted online:2011/10/25

Get Citation: Lu Tian, Kun Zhao, Qingli Zhou, Yulei Shi, Dongmei Zhao, Cunlin Zhang, Songqing Zhao, "Diffusion interaction and quantitative analysis of zinc dialkyldithiophosphate content in lube base oils in terahertz regime," Chin. Opt. Lett. 09(11), 110010(2011)

Note: This work was supported by the Program for New Century Excellent Talents in University (No. NCET-08-0841), the National Natural Science Foundation of China (Nos. 50672132, 60778034, and 60877038), the Research Fund for the Doctoral Program of Higher Education (No. 200804250006), and the State Key Laboratory of Heavy Oil Processing, China University of Petroleum (No. 2008-14).



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