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Efedrina for identifying different optical rotation performances by THz-TDS

A technology of optical activity and ephedrine hydrochloride, which is applied in the direction of color/spectral characteristic measurement, polarization influence characteristics, material analysis through optical means, etc., can solve the problem of identification of substances that cannot be similar in structure, cumbersome and time-consuming analysis methods, and test samples Unable to continue to use and other problems, to achieve the effect of non-destructive non-contact identification, high signal-to-noise ratio, and low energy

Inactive Publication Date: 2009-05-20
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

Some of these fingerprint analysis methods require sample pretreatment, the analysis operation method is cumbersome and time-consuming, the test sample cannot be used, and some cannot identify substances with similar structures

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  • Efedrina for identifying different optical rotation performances by THz-TDS
  • Efedrina for identifying different optical rotation performances by THz-TDS
  • Efedrina for identifying different optical rotation performances by THz-TDS

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Embodiment Construction

[0019] The following is based on Figure 1 to Figure 3 , give a preferred embodiment of the present invention, and give a detailed description, so that the functions and characteristics of the present invention can be better understood.

[0020] The detection of ephedrine hydrochloride is in such as figure 1 The terahertz time-domain spectroscopy shown was performed on the setup. The experimental device is composed of the Mai Tai femtosecond laser manufactured by the American Spectrophysics Corporation and the Z-1 THz-TDS system developed by the American Zomega Company. The device is as follows: figure 1 shown. Spectrum measurement range is (0.5 ~ 1.8THz). The laser power of the femtosecond laser is 0.75W, and the laser pulse generated by the laser with a center wavelength of 800nm ​​and a pulse width of 100fs is divided into two beams. One beam is used as the generated light, which generates THz light through GaAs(110) crystal grown at low temperature, and focuses on the ...

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Abstract

The invention discloses a method of utilizing THz-TDS to identify ephedrine with different optical activity. The method mainly utilizes a terahertz time-domain spectrum device to detect the THz fingerprint frequency spectra of the ephedrine hydrochloride with different optical activity in a range between 0.5 and 1.8 THz, and the optical activity of an ephedrine hydrochloride sample can be easily identified through the THz fingerprint frequency spectra. The method has the characteristics of rapidity and lossless detection.

Description

technical field [0001] The invention relates to a new method for detecting the optical rotation of ephedrine hydrochloride, specifically, a method for detecting ephedrine hydrochloride with different optical rotations by applying terahertz time-domain spectroscopy technology. Background technique [0002] THz (Terahertz) radiation is located between far-infrared and microwave on the electromagnetic spectrum, and it is a new subject with the rapid development of ultrafast laser technology. Spectral properties (including emission, reflection and transmission) of substances in the THz band contain rich physical and chemical information. Generally, the vibration absorption frequency of chemical bonds of organic molecules is mainly concentrated in the mid-infrared band, but the collective vibration mode of molecules corresponds to the THz band, and has a highly sensitive response to the absorption position and intensity of the THz spectrum. In addition, THz photon energy is very...

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Application Information

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IPC IPC(8): G01N21/31G01N21/21G01N21/3563G01N21/3586
Inventor 马士华刘桂锋吉特宋西玉张鹏王文锋
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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