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International Journal of Analytical Chemistry
Volume 2017, Article ID 7305682, 9 pages
Research Article

Detailed Componential Characterization of Extractable Species with Organic Solvents from Wheat Straw

1School of Basic Education Sciences, Xuzhou Medical University, Xuzhou 221004, China
2Advanced Analysis & Computation Center, China University of Mining & Technology, Xuzhou 221116, China
3Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, China

Correspondence should be addressed to Yao Lu; moc.361@oamiyul

Received 17 March 2017; Revised 25 July 2017; Accepted 18 September 2017; Published 1 November 2017

Academic Editor: Nilusha Sudasinghe

Copyright © 2017 Yong-Chao Lu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Componential analysis of extractives is important for better understanding the structure and utilization of biomass. In this investigation, wheat straw (WS) was extracted with petroleum ether (PE) and carbon disulfide (CS2) sequentially, to afford extractable fractions and , respectively. Detailed componential analyses of and were carried out with Fourier transform infrared (FTIR) spectroscopy, gas chromatography/mass spectrometry (GC/MS), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), energy dispersive spectrometry (EDS), and electron probe microanalysis (EPMA). Total extractives were quantified 4.96% by weight compared to the initial WS sample. FTIR and GC/MS analyses results showed that PE was effective for the extraction of ketones and waxes derived compounds; meanwhile CS2 preferred ketones and other species with higher degrees of unsaturation. Steroids were enriched into and with considerable high relative contents, namely, 64.52% and 79.58%, respectively. XPS analysis showed that most of the C atoms in extractives were contained in the structures of C-C, C-COOR, and C-O. TEM-EDS and EPMA analyses were used to detect trace amount elements, such as Al, Si, P, S, Cl, and Ca atoms. Detailed characterization of extractable species from WS can provide more information on elucidation of extractives in biomass.