| 光谱学与光谱分析 |
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| Preliminary Study on the Surface Enhanced Raman Spectrum of Tea |
| CHEN Yong-jian, FENG Shang-yuan, GUO Xiao-lin, XI Gang-qin, WANG Jing, CHEN Rong* |
| Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Normal University, Fuzhou 350007, China |
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Abstract In the present paper, taking Tiegunyin tea as an example, surface enhanced Raman scattering (SERS) spectrum of tea was obtained, the effects of different active substrates were explored from the aspects of enhanced factor, background noise, repeatability, and signal to noise ratio (SNR), while the impact of adsorption time on the measurement was also discussed. The results show that it is feasible to obtain the SERS spectrum of tea, and Raman signal of SERS spectrum was greatly enhanced compared with that of regular Raman spectrum. The active substrate of silver colloid prepared by the reduction of silver nitrate and trisodium citrate has a better enhanced effect, while different adsorption times have no direct influences on the SERS measurement. The method based on SERS firstly proposed in this paper may provide an alternative method for the discriminant analysis and quality identification of tea.
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Received: 2012-03-30
Accepted: 2012-06-15
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Corresponding Authors:
CHEN Rong
E-mail: chenr@fjnu.edu.cn
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