期刊
JOURNAL OF LUMINESCENCE
卷 185, 期 -, 页码 174-179出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2017.01.016
关键词
Graphene oxide; Amino acids; Ninhydrin; Resonance Rayleigh scattering-energy transfer
类别
资金
- National Natural Science Foundation of China [21477025, 21367005, 21365011, 21465006, 21667006]
- Scientific Research and Technological Development Program of Guangxi [GKH14251003]
- Natural Science Foundation of Guangxi [2013GXNSFFA019003, 2013 GXNSFAA019046]
In pH 7.2 KH2PO4-NaOH buffer solution, graphene oxide (GO) has strong resonance Rayleigh scattering (RRS) effect at 400 nm, and amino acid reacted with ninhydrin to form blue-violet complex Ruhemann's purple (RP) with a absorption peak at 400 nm. RPs can strongly adsorbed on the surface of GO, and the RRS donor of GO probes coupled with the receptor of RP that reduced the RRS intensity at 400 nm due to the RRS-energy transfer (RRS-ET) from the GO to RR With the increase of amino acid concentration, the RRS intensity quenched linearly at 400 nm due to the RRS-ET enhancing. The quenched intensity responds linearly with glutamic acid concentration in the range of 0.2-200 mu mol L-1, with a detection limit of 0.08 mu mol L-1. This simple and sensitive RRS-ET method was used to detect the content of amino acid in oral liquid, with satisfactory results. (C) 2017 Elsevier B.V. All rights reserved.
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