11 December 2012 Surface-enhanced Raman spectroscopy study of radix astragali based on soxhlet extractor
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Due to its high sensitivity, flexibility, and “fingerprints” sensing capability, Surface-enhanced Raman Spectroscopy (SERS) is a very powerful method for characterization of substances. In this paper, two kinds of Radix Astragali with different quality were firstly extracted through continuous circumfluence extraction method and then mixed with silver nanoparticles for SERS detection. Most Raman bands obtained in Radix Astragali extraction solution are found at 300-7000cm-1 and 900-1390 cm-1. Although, major peak positions at 470, 556, 949, 1178 and 1286 cm-1 found in these two kinds of Radix Astragali appear nearly the same, Raman bands of 556 and 1178 cm-1 are different in intensity, thus may be used as a characteristic marker of Radix Astragali quality. In detail, we can make full use of the different intensity of two different kinds but the same state at 556 cm-1 to describe the quality standard of Radix Astragali. Our preliminary results show that SERS combining with continuous circumfluence extraction method may provide a direct, accurate and rapid detection method of Radix Astragali.
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Peng Lu, Peng Lu, Juqiang Lin, Juqiang Lin, Nengrong Liu, Nengrong Liu, Yonghong Shao, Yonghong Shao, Jing Wang, Jing Wang, Wei Shi, Wei Shi, Jinyong Lin, Jinyong Lin, Rong Chen, Rong Chen, } "Surface-enhanced Raman spectroscopy study of radix astragali based on soxhlet extractor", Proc. SPIE 8553, Optics in Health Care and Biomedical Optics V, 855325 (11 December 2012); doi: 10.1117/12.1000240; https://doi.org/10.1117/12.1000240

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