Liquid sample cell

A liquid sample and sample cavity technology, which is applied in the field of liquid sample cells for far-infrared terahertz spectral measurement, can solve the problems of non-leakage, inability to take into account control and detection accuracy at the same time, and achieves reduction of measurement errors, reliable reference value, The effect of improving measurement efficiency

Inactive Publication Date: 2012-10-03
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a liquid sample suitable for terahertz time-domain spectroscopy measurement in order to overcome the defects that the existing technology cannot simultaneously control the detection accuracy, realize the same batch measurement of multiple samples, and not leak. Pools and their methods

Method used

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  • Liquid sample cell
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 , figure 2 Shown is a single measuring cell. 1 is an optical window, 2 is a sample cavity, 31 and 32 are input or output ports. Among them, 1 is composed of two optical windows, the first optical window 11 and the second optical window 12 are laminated and sealed, and the materials of the first optical window 11 and the second optical window 12 are generally composed of light-transmitting materials, such as: polyethylene , polytetrafluoroethylene, silicon wafer, quartz, polystyrene, and cycloolefin copolymers, etc., considering the absorption of terahertz waves by materials and avoiding the influence of multiple reflections, the first optical window 11 and the second optical window 12 The material thickness can usually be selected between 1 and 3 mm.

[0027] A groove 21 and a groove 22 are respectively provided on the first optical window 11 and the second optical window 12. The shape of the groove 21 and the groove 22 is set as a circle, and the t...

Embodiment 2

[0033] Such as image 3 As shown, a measurement cell is formed by the channel 31, the channel 32 and the sample cavity 2, and multiple measurement cells are arranged side by side in the rectangular optical window 1. Wherein, the channel 31 and the channel 32 respectively lead to two sides of the rectangular optical window 1 . The thickness of the sample cavity 2 can be the same, so that different samples can be compared effectively and quickly. The sample cavity 2 can also be of different thicknesses, which can facilitate the comparison of parameters of samples with different thicknesses.

Embodiment 3

[0035] Such as Figure 4 As shown, a measuring cell is formed by a channel 31, a channel 32 and a sample chamber 2, and a plurality of measuring cells are arranged in a circle in the circular optical window 1, wherein the channel 31 and the channel 32 respectively lead to the inside of the circular optical window 1 ring and outer ring. The thickness of the sample cavity 2 can be the same, so that different samples can be compared effectively and quickly. The sample cavity 2 can also be of different thicknesses, which can facilitate the comparison of parameters of samples with different thicknesses.

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Abstract

The invention discloses a liquid sample cell which comprises a first optical window and a second optical window, wherein a groove is carved on the first optical window, the first optical window and the second optical window are laminated and sealed, and a sample cavity is formed at the groove position. By using the liquid sample cell for measurement, the measurement of trace sample can be met, the measuring error is effectively reduced, different samples have more reliable reference value and the measuring efficiency is improved. Dynamic sample measurement can be realized by adopting a sample flowing manner.

Description

technical field [0001] The invention relates to a liquid sample pool, in particular to a liquid sample pool suitable for far-infrared terahertz band spectrum measurement. Background technique [0002] The terahertz time-domain spectroscopy system is a coherent detection technique that can simultaneously obtain the amplitude and phase information of a terahertz pulse. This technology uses terahertz pulse transmission or reflection to record the terahertz time-domain electric field waveform, and obtain the spectrum of the sample through fast Fourier transform. Through data processing and analysis, the optical parameters of the measured sample can be obtained, such as refractive index, Absorption coefficient, etc., and then obtain some other important physical and chemical information of the sample. [0003] In terahertz time-domain spectroscopy, different samples have different absorption of terahertz light. When light passes through a sample of a certain thickness, a corres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01
Inventor 赵红卫张建兵武宇亭杨航李晴暖
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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