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Terahertz detection method for stupefacient

A technology of narcotic drugs and detection methods, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of strong penetrating power, high X-ray energy, residual traces, etc., and achieve the effect of improving detection efficiency and shortening detection time

Inactive Publication Date: 2010-01-06
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the spectroscopic method is non-destructive testing, it is limited by each spectrum; the latter methods belong to destructive testing and are not suitable for application in the field of anti-narcotics
Commonly used in customs are X-ray scanning, trace detection, police dog identification, etc. These methods also have limitations: X-ray energy is high, penetrating power is strong, only the general outline can be distinguished but the type cannot be determined; for trace detection and police dog identification , only limited to traces of drugs remaining on the outside of the package

Method used

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  • Terahertz detection method for stupefacient
  • Terahertz detection method for stupefacient
  • Terahertz detection method for stupefacient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, taking morphine as an example.

[0026] The first step is to prepare a standard sample of morphine. Weigh 30 mg of morphine and 120 mg of polyethylene, grind the morphine and mix it uniformly with polyethylene powder, and the mass ratio is controlled at 1:4. A circular sheet with a diameter of 1.3 cm and a thickness of about 1.2 mm was made on a tablet press with a pressure of 4 tons. In the second step, the experimental measurement and the establishment of the spectral library. The sample was placed on a rotating sample holder, filled with nitrogen for about 2 hours to remove the air in the device, and then measured using terahertz time-domain spectroscopy. The test environment is under a nitrogen atmosphere at room temperature, the air humidity range is 4%, and the frequency range of the terahertz absorption spectrum of anesthetics is 0.3-2.0THz. Convert the time-domain spectrum to frequency-domain spectrum by Fourier transform, and then use the data p...

Embodiment 2

[0027] Embodiment 2, the narcotic drug is thebaine.

[0028] Equally, at first prepare the standard sample of thebaine, take by weighing 30mg thebaine and 60mg polyethylene, after thebaine is ground, mix with polyethylene powder evenly, mass ratio is controlled at 1: 2, on tablet machine with 4 tons The pressure is made into a circular sheet with a diameter of 1.3 cm and a thickness of about 0.8 mm. Put the thebaine sample on the rotating sample rack, fill it with nitrogen for about 2 hours, and measure it by using terahertz time-domain spectroscopy at room temperature under a nitrogen atmosphere with an air humidity range of 40%. And convert the time domain spectrum into frequency domain spectrum through Fourier transform, and then use the data processing program to get the terahertz absorption spectrum of thebaine in the frequency range of 0.3-2.0THz, attached image 3 Shown is the terahertz fingerprint of a standard sample of thebaine. from image 3 It can be seen that t...

Embodiment 3

[0029] Embodiment 3, the narcotic drug is papaverine hydrochloride.

[0030] Similarly, first prepare the standard sample of papaverine hydrochloride, weigh 30 mg papaverine hydrochloride and 240 mg polyethylene, grind papaverine hydrochloride and uniformly mix with polyethylene powder, the mass ratio is controlled at 1: 8, and 4 tons The pressure is made into a circular sheet with a diameter of 1.3cm and a thickness of about 1.8mm. Put the papaverine hydrochloride sample on the rotating sample rack, fill it with nitrogen for about 2 hours, and measure it by terahertz time-domain spectroscopy at room temperature under a nitrogen atmosphere with an air humidity range of 20%. And convert the time domain spectrum into frequency domain spectrum through Fourier transform, and then use the data processing program to get the terahertz absorption spectrum of papaverine hydrochloride in the frequency range of 0.3-2.0THz, attached Figure 4 Shown is the terahertz fingerprint of papaver...

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Abstract

The invention discloses a method for constructing standard fingerprints by applying terahertz waves to detect stupefacient, which comprises the following steps: preparing a standard sample of the stupefacient which is any one of morphine, thebaine, papaverine hydrochloride, cocaine hydrochloride and pethidine hydrochloride, and detecting the standard sample of the stupefacient and constructing a standard fingerprint database by applying a terahertz spectroscopic device; and detecting an unknown sample by using the constructed standard fingerprint database. The terahertz technology can accurately judge sorts of drugs in packaging materials. Detections to the drugs with terahertz do not damage human bodies, materials and drugs, thereby realizing nondestructive detection.

Description

technical field [0001] The invention relates to a method for detecting narcotics, in particular to a method for detecting narcotics by using terahertz waves to construct a standard fingerprint. Background technique [0002] According to Article 357 of the "Criminal Law of the People's Republic of China", drugs refer to opium, heroin, methamphetamine (ice), morphine, marijuana, cocaine, and other narcotic drugs and psychotropic substances controlled by the state that can cause people to become addicted. [0003] At present, the methods for identifying the type and content of drugs mainly include: spectroscopic methods (including infrared spectroscopy, Raman spectroscopy, X-rays, mass spectrometry, etc.), chromatography, and capillary electrophoresis. Although the spectroscopic method is non-destructive testing, it is limited by each spectrum; the latter methods belong to destructive testing and are not suitable for application in the field of anti-drugs. Commonly used in cus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 刘桂锋马士华吉特张兆霞宋西玉张鹏王文锋
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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