采用显微共焦拉曼光谱技术测试研究了L-茶氨酸， 得到了L-茶氨酸的拉曼谱图， 发现在250~1 700和2 800~3 000 cm-1能够观测到明显的拉曼信号； 通过对谱峰进行归属和分析， 得到了不同波数范围内的特征振动模式； 其中， 在321， 900， 938， 1 153， 1 312， 1 358， 1 454和1 647 cm-1找到8个较强的拉曼信号， 可作为L-茶氨酸的特征峰。 结果表明： 拉曼光谱可能成为一种直接、 准确和快速的检测茶氨酸的方法。Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Normal University, Fuzhou350007, ChinaAbstractKeywords

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.