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Materials 2017, 10(4), 443; doi:10.3390/ma10040443

Linear Graphene Nanocomposite Synthesis and an Analytical Application for the Amino Acid Detection of Camellia nitidissima Chi Seeds

1
School of Ying-Dong Food Sciences and Engineering, Shaoguan University, Shaoguan 512005, China
2
Soochow Tanfeng Graphene Technology Co. Ltd., Suzhou 215100, China
3
School of Medicine, Jiaying University, Meizhou 513031, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Barbara Zavan
Received: 16 March 2017 / Revised: 16 April 2017 / Accepted: 19 April 2017 / Published: 24 April 2017
(This article belongs to the Special Issue Bioapplications of Graphene Composites)
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Abstract

Husk derived amino modified linear graphene nanocomposites (aLGN) with a diameter range of 80–300 nm and a length range of 100–300 μm were prepared by a modified Hummers method, ammonia treatment, NaBH4 reduction and phenylalanine induced assembly processes, etc. The resulting composites were characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), scanning electron microscopy (SEM), biological microscope (BM), and X-ray diffraction spectroscopy (XRD), etc. Investigations found that the aLGN can serve as the novel coating of stir bar sorptive extraction (SBSE) technology. By combing this technology with gas chromatography–mass spectrometry (GC-MS), the combined SBSE/GC-MS technology with an aLGN coating can detect seventeen kinds of amino acids of Camellia nitidissima Chi seeds, including Ala, Gly, Thr, Ser, Val, Leu, Ile, Cys, Pro, Met, Asp, Phe, Glu, Lys, Tyr, His, and Arg. Compared to a conventional polydimethylsiloxane (PDMS) coating, an aLGN coating for SBSE exhibited a better thermal desorption performance, better analytes fragmentation depressing efficiencies, higher peak intensities, and superior amino acid discrimination, leading to a practicable and highly distinguishable method for the variable amino acid detection of Camellia nitidissima Chi seeds. View Full-Text
Keywords: linear graphene nanocomposites; stir bar sorptive extraction; amino acid; Camellia nitidissima Chi linear graphene nanocomposites; stir bar sorptive extraction; amino acid; Camellia nitidissima Chi
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Cheng, J.; Zhong, R.; Lin, J.; Zhu, J.; Wan, W.; Chen, X. Linear Graphene Nanocomposite Synthesis and an Analytical Application for the Amino Acid Detection of Camellia nitidissima Chi Seeds. Materials 2017, 10, 443.

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