Time filter

Source Type

Wang Y.,Nankai University | Chen P.,Nankai University | Lin L.,Nankai University | Zhang K.,Narcotics Control Bureau of Tianjin Public Security Bureau | And 4 more authors.
Guangdianzi Jiguang/Journal of Optoelectronics Laser | Year: 2014

Based on the principle of single photon counting, the prototype for detecting trace narcotics is designed and constructed according to the photo-induced delayed luminescence. The performance of the prototype is evaluated, and the results show that the dark count of the photomultiplier (PMT) is 11.5 ±0.7 photons/s, and the system dark count is 11.7 ±0.7 photons/s. The performance of the prototype on shielding stray light is excellent. The DL decay curves and parameters of the healthy personnel and the suspected methamphetamine personnel serum samples are measured by using the prototype, and the experimental results show that all the parameters between the two samples are obviously different. The prototype has the advantages of high sensitivity and low sample consumption, except that the testing process is not in direct contact with the sample, so it provides a powerful tool for detecting trace narcotics in biological samples. ©, 2014, Board of Optronics Lasers. All right reserved.

Discover hidden collaborations