title: [Raman spectral analysis of theanine].
abstract: The L-theanine was tested using confocal Raman microscopy. Obvious Raman bands were showed in the range of 250 -1 700 and 2 800-3 000 cm(-1). The Raman bands were assigned with a preliminary analysis and the characteristic vibrational modes were gained in different range of wave numbers. Eight strong Raman bands were observed in the Raman spectra at 321, 900, 938, 1 153, 1 312, 1 358, 1 454 and 1 647 cm(-1), respectively. They are the characteristic Raman bands of L-theanine. The results showed that Raman spectroscopy might be a new kind of precise, direct and fast detecting method for theanine.
authors.affiliation: Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Normal University, Fuzhou 350007, China. yjchen007@163.com
authors.forename: Yong-Jian
authors.initials: YJ
authors.lastname: Chen
authors.forename: Rong
authors.initials: R
authors.lastname: Chen
authors.forename: Yong-Zeng
authors.initials: YZ
authors.lastname: Li
authors.forename: Zu-Fang
authors.initials: ZF
authors.lastname: Huang
authors.forename: Jie-Si
authors.initials: JS
authors.lastname: Chen
authors.forename: Duo
authors.initials: D
authors.lastname: Lin
authors.forename: Gang-Qin
authors.initials: GQ
authors.lastname: Xi
mesh_terms: D005971:Glutamates / Q000032:analysis*; D013059:Spectrum Analysis, Raman; D014732:Vibration
chemical_list: D005971:Glutamates; C026166:theanine