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Micro-fluidic liquid sample cell for dynamic spectral detection analysis and application thereof

A liquid sample, dynamic spectrum technology, applied in the measurement of color/spectral characteristics, material analysis by optical means, analysis of materials, etc. The effect of repeating the measurement many times, expanding the scope of application, and avoiding contamination of the sample

Pending Publication Date: 2019-07-02
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of poor stability, complex structure, susceptibility to external interference, and difficulty in ensuring measurement accuracy in the prior art in the measurement of liquid samples by laser spectroscopy, the present invention provides a micro-flow liquid sample for dynamic spectral detection and analysis. pools and their uses
[0006] For the limitations of existing dynamic spectrum acquisition devices, the sample cell of the present invention mainly considers the following limiting issues: (1) how to overcome the influence of solvent on the reaction and the interference to spectral determination; (2) the sample solution needs to be considered in quantitative determination The configuration process and the errors introduced; (3) When the temperature is high, the high pressure hazard caused by solvent volatilization or its vapor needs to be considered; (4) For trace samples, how to reduce the size of the sample cell while maintaining high sensitivity to accommodate Very small sample volume; (5) Maintain the stability and consistency of test results under high-energy laser irradiation for a long time

Method used

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  • Micro-fluidic liquid sample cell for dynamic spectral detection analysis and application thereof
  • Micro-fluidic liquid sample cell for dynamic spectral detection analysis and application thereof
  • Micro-fluidic liquid sample cell for dynamic spectral detection analysis and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Combine below Figure 1-Figure 4 and examples describe in detail the specific implementation of the present invention, such as Figure 1-Figure 4 As shown, this embodiment provides a microflow liquid sample cell for dynamic spectrum detection and analysis, which includes a magnetic induction rotation system, a motor drive and control system, and a sample cell system;

[0051] The sample pool system includes a sample pool 1;

[0052] The magnetic induction rotation system includes a rotor 4, a magnetic turntable 12 and a magnetic shaft 13; the rotor 4 is placed in the sample pool 1; the magnetic turntable 12 is used to control the rotation of the rotor 4 placed in the sample pool 1;

[0053] Described motor transmission and control system comprises power supply 28, controller 29 and DC motor 18; Described power supply 28 is electrically connected with controller 29 and DC motor 18; Described controller 29 is used for controlling the rotating speed of DC motor 18;

[00...

Embodiment 2

[0071] The micro-flow liquid sample cell described in Example 1 can be used in a femtosecond broadband pump (pump)-detection (probe) spectrometer system, and can perform chemical reaction kinetics at the macroscopic and single-molecule level of condensed phase complex molecules multiple studies.

[0072] The sample detected by the microfluidic liquid sample cell used in this embodiment is diethylaminohydroxyflavone (4'-N,N-diethylamino-3-hydroxyflavone, DEAHF).

[0073] In this example application, the shape of the sample cell is cuboid, the size of the sample cell is 1mm (width)×10mm (height)×45mm (length), the volume is less than 0.5ml, and the applicable wavelength is 200-2500nm. The width of the sample cell is actually the distance that light passes through the sample cell, that is, the optical path of the sample cell.

[0074] Figure 5 For the diethylaminohydroxyflavone femtosecond broadband pump-detection transient absorption spectrum shown in embodiment 2 and the mul...

Embodiment 3

[0078] The microflow liquid sample cell described in embodiment 1 can also be used in this more complicated device of femtosecond stimulated Raman spectrometer (results such as Figure 7 shown), and achieved good results.

[0079] In this example application, the shape of the sample cell is cuboid, the size of the sample cell is 1mm (width)×10mm (height)×45mm (length), the volume is less than 0.5ml, and the applicable wavelength is 200-2500nm. The width of the sample cell is actually the distance that light passes through the sample cell, that is, the optical path of the sample cell.

[0080] Figure 7 It is the real-time acquisition interface diagram of the femtosecond stimulated Raman spectrum shown in Example 3. Such as Figure 7 As shown, it can be seen that the stimulated Raman signal collected by the microfluidic liquid sample cell system can also maintain high stability and sensitivity for scarce and precious trace samples, which provides a good guarantee for subsequ...

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Abstract

The invention discloses a micro-fluidic liquid sample cell for dynamic spectral detection analysis and application thereof. The micro-fluidic liquid sample cell includes a magnetic induction rotationsystem, a motor drive and control system, and a sample cell system. The sample cell has advantages of simple design, compact structure, flexible usage, and small occupied space and is suitable for being arranged in the light path of the instrument. The sample cell is suitable for optical measurement on micro samples because of the small limited sample receiving space. The sample cell having good sealing and anti-corrosion performances is suitable for measurement of volatile and highly corrosive samples. With the sample cell, all samples can flow stably in the limited receiving space without aliquid stationary zone, thereby avoiding or reducing signal noises caused by sample turbulences. Since the rotor employs the structural design of polytetrafluoroethylene coating, the rotor is protected from being corroded by the sample and the sample pollution by the rotor is also avoided. The sample cell is convenient to mount or dismount and clean; the influence on the light path of the spectrograph is extremely low; and multi-times repeated measurement is performed conveniently.

Description

technical field [0001] The invention relates to the technical field of instruments and equipment used in spectral detection and analysis, in particular to a microflow liquid sample cell for dynamic spectral detection and analysis and its application. Background technique [0002] In order to obtain information about the chemical bonds or functional groups of organic molecules, it is often necessary to perform spectral measurements. For liquid samples, the traditional detection method is to use the liquid film method to make the liquid sample into a thin film that meets the requirements and then measure the spectrum. However, the liquid film method is only suitable for non-volatile samples. Due to the non-volatile The contact angle of polar solvents is too small, it is difficult to form a liquid film, and it is difficult to make a thin film that meets the requirements; and due to the uncertainty of manual operation, the error of the obtained results is relatively large, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/31
CPCG01N21/01G01N21/31
Inventor 郭前进夏安东王娴
Owner INST OF CHEM CHINESE ACAD OF SCI
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