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Experimental Chemicals and raw materials Industrial grade n-hexane crude was purchased from Beijing local market.
Figure 1 indicated that the pesticide residues which are sensitive to GC-ECD contented in the raw materials were purified with this process.
This study developed a patented process to produce pesticide residue analysis grade n-hexane from industrial raw material, which including decolour step, two towers distillation and filtration.
Acknowledgements Can QUAN acknowledges the Ministry of Science and Technology of People’s Republic of China for Key Projects in the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period (2009BAK61B02); the Ministry of science and technology of People’s Republic of China (2011FY130100); the General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China (ASPAQ1101-1); the National Institute of Metrology (21-JB1127) for financing.
Hassett, Journal of High Resolution Chromatography,Vol.561 (1993),p16

Introduction In recent years more interests of magnesium alloys as ideal materials for lightweight have been taken on account of the combination of low density, high specific strength and stiffness, and excellent castability constructions[1-8].
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Introduction The macro- and micro-material structures are most determined by the solidification process and one or several solidification of the cast material occur.
Ode: Journal of Crystal Growth Vol. 261 (2004), P135 [8] J.
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Kanno Laboratory of Materials Design and Interface Engineering Department of Nanomechanics, Graduate School of Engineering Tohoku University, Sendai, 980-8578, Japan a watanabe@mdie.mech.tohoku.ac.jp, bturekawa@ mdie.mech.tohoku.ac.jp Keywords: Magnetic annealing, magnetic field, grain boundary microstructure, grain boundary engineering, grain growth, nanocrystalline materials, magnetic materials.
On the other hand, the importance and usefulness of the application of external fields such as magnetic, electric, ultrasonic stress fields, etc. during materials processing has been increasingly recognized for engineering of advanced materials [3].
Recently, the application of a magnetic field has been particularly drawing an increasing attention of materials scientists and engineers as a new and unique materials processing method to engineer the microstructures in ferromagnetic iron, iron alloys, steels and other metallic materials [3-7].
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Bae: Key Engineering Materials Vols. 345-346 (2007), p. 1497
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Thus the n kinds of cutting programs and their corresponding materials left can be obtained.
For Group Ⅱ, the raw materials of 2800´2300 (mm´mm) are chosen.
For Group III, the raw materials of 3100´2600 (mm´mm) are chosen.
Journal of Huazhong University of Science and Technology. 2003, 31 (6): 9～12
Journal of Computer-Aided Design & Computer Graphics. 2006,1: 125～127

Science. 2011;334(6058):935-9
On the development of proton conducting materials for technological applications.
Journal of Materials Science. 2001;36(5):1149-60 [9] Haile SM, West DL, Campbell J.
Journal of Materials Research. 1998;13(06):1576-95
Journal of Materials Science & Technology. 2013;29(2):137-41.

The research applies reverse engineering method to sample the blade material in order to get the equivalent material properties of complex composite 3D blade.
The finite element model was built with the lumped equivalent material properties.
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“Equivalent thermal Expansion Coefficients of Lumped Layer in Laminated Composites”, Composites Science and Technology, 66 (14), p.2402-2408, Nov 2006.

Silk fiber composites have been used for biomedical materials, bioengineering materials， specially tailored lightweight structural parts， etc, but rarely applied to decoration in overseas[3,4].
Experiment Materials.
Tao: Composites Part B: Engineering Vol. 36(2008), p. 1026 [4] S.O.Han, S.M.Lee and W.H.Park: Journal of Applied Polymer Science Vol. 100(2006), p. 4972 [5] W.
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Wan: Journal of Huizhou University(Natural Sciences) Vol. 23(2003), p. 16

But researches most focused on inorganic materials modified by surface active agent, such as bentonite, white clay, carbon black, quart sand and so on[9,10], few scholars use the surface active agent to modify the ion exchange resin[11,12].
Materials and Method Materials.
[5] Jingquan Li, Yongan Gu: Separation and Purification Technology Vol.42 (2005), p.1-13 [6] Fei Ji, Chaolin Li,Xiaoqing Dong,Yang Li and Dandan Wang: Journal of Hazardous Materials Vol.164(2009),p.1346-1351
[7] Radmila Secerov Sokolovic,Slobodan Sokolovic and Snezana Sevic: Journal of Hazardous Materials Vol.162(2009), p.410-415
[9] Jovan Lemic, Magdalena Tomasevic-C anovic, Mirjana Djuricic and Tanja Stanic: Journal of Colloid and Interface Science Vol.292 (2005), p.11–19