The narcotics such as ecstasy, methamphetamine, and heroin normally can emit fluorescence under excitation with certain wavelengths. Because of the small number of fluorescent groups in the molecular structure or the low quantum efficiency, the fluorescence intensity of narcotics is relatively weak and the narcotics with low concentration are difficult to be detected, which severely hampers the detection of the narcotics. In this paper, for improving the detection sensitivity of the fluorescence spectrum te...
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