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Proceedings Paper

Non-destructive inspections of illicit drugs in envelope using terahertz time-domain spectroscopy
Author(s): Ning Li; Jingling Shen; Meihong Lu; Yan Jia; Jinhai Sun; Laishun Liang; Yanning Shi; Xiaoyu Xu; Cunlin Zhang
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Paper Abstract

The absorption spectra of two illicit drugs, methylenedioxyamphetarnine (MDA) and methamphetamine (MA), within and without two conventional envelopes are studied using terahertz time-domain spectroscopy technique. The characteristic absorption spectra of MDA and MA are obtained in the range of 0.2 THz to 2.5 THz. MDA has an obvious absorption peak at 1.41 THz while MA has obvious absorption peaks at 1.23 THz, 1.67 THz, 1.84 THz and 2.43 THz. We find that the absorption peaks of MDA and MA within the envelopes are almost the same as those without the envelopes respectively although the two envelopes have some different absorption in THz waveband. This result indicates that the type of illicit drugs in envelopes can be determined by identifying their characteristic absorption peaks, and THz time-domain spectroscopy is one of the most powerful candidates for illicit drugs inspection.

Paper Details

Date Published: 27 October 2006
PDF: 8 pages
Proc. SPIE 6047, Fourth International Conference on Photonics and Imaging in Biology and Medicine, 60472Y (27 October 2006); doi: 10.1117/12.710671
Show Author Affiliations
Ning Li, Capital Normal Univ. (China)
Jingling Shen, Capital Normal Univ. (China)
Meihong Lu, Capital Normal Univ. (China)
Yan Jia, Capital Normal Univ. (China)
Jinhai Sun, Capital Normal Univ. (China)
Laishun Liang, Ministry of Public Security of China (China)
Yanning Shi, Ministry of Public Security of China (China)
Xiaoyu Xu, Ministry of Public Security of China (China)
Cunlin Zhang, Capital Normal Univ. (China)

Published in SPIE Proceedings Vol. 6047:
Fourth International Conference on Photonics and Imaging in Biology and Medicine
Kexin Xu; Qingming Luo; Da Xing; Alexander V. Priezzhev; Valery V. Tuchin, Editor(s)

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