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Liquid core waveguide flow-through cell for UV spectrophotometric detector

A detector and spectroscopic technology, used in color/spectral characteristic measurement, instruments, measuring devices, etc., can solve the problems of light intensity attenuation, increase absorption optical path, limited physical size of flow cells, etc., to reduce optical attenuation, improve The effect of sensitivity

Active Publication Date: 2014-04-30
ANHUI WAYEE SCI & TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In the actual use of liquid chromatography, the smoothness of the small holes on the stainless steel parts is usually only 0.8. Due to the scattering of light by the liquid and the offset of the external light path, the light is not in the absorption area of ​​the flow cell and should not be irradiated on the inner wall of the small hole. , the resulting light intensity attenuation
At the same time, due to the limitation of the size of the external optical path, the physical size of the flow cell is limited, such as figure 2 As shown, the dimension A cannot be changed after the instrument design is finalized, so it is impossible to increase the absorption path length in the detection of extremely low concentration samples

Method used

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  • Liquid core waveguide flow-through cell for UV spectrophotometric detector
  • Liquid core waveguide flow-through cell for UV spectrophotometric detector
  • Liquid core waveguide flow-through cell for UV spectrophotometric detector

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specific Embodiment

[0023] When the entire liquid phase system is running, there is always liquid flowing through the flow cell, and the absorbance of the flowing liquid is monitored in real time.

[0024] Such as Figure 5 As shown, the liquid flows in from one of the interface components of the flow cell, and flows through the optical hole formed by the liquid core waveguide to the other interface component. There is input light through the coupling optical path in the optical hole. When the flowing liquid absorbs the passing light, the output light intensity will decrease, and the absorbance value is calculated from this.

[0025] Such as Figure 4 As shown, the liquid flows in from the liquid interface of the input interface assembly, and then flows to the liquid core waveguide. When the inside of the liquid core waveguide is uniformly filled with liquid, an ideal step-index optical fiber is formed, as shown in Image 6 The condition shown, and then flow out from the output interface assemb...

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Abstract

The invention discloses a liquid core waveguide flow-through cell for a UV spectrophotometric detector. The flow-through cell comprises a shell, and a pair of interface components with the same structure. The two interface components are assembled symmetrically on both sides of the shell, the shell is provided inside with a liquid core waveguide, and two ends of the liquid core waveguide are respectively connected to the interface components through cone press rings. The present invention employs liquid core waveguide total emission absorption optical path design to reduce the optical attenuation, improve the sensitivity of the UV spectrophotometric detector, extend the detection range of detector and greatly enhance the practicality of the detector.

Description

technical field [0001] The invention relates to the field of ultraviolet spectroscopic detectors, in particular to a liquid core waveguide flow cell used for ultraviolet spectroscopic detectors. Background technique [0002] Liquid chromatography technology has become one of the most commonly used analytical methods in laboratories due to its wide adaptability. The test tool is high-performance liquid chromatography. The ultraviolet spectroscopic detector is a core component of the high-performance liquid chromatography. Among all the detectors suitable for liquid phase systems, the ultraviolet spectroscopic detector accounts for about 70%. The performance of the optical response of the ultraviolet spectroscopic detector directly affects the main system indicators such as noise, repeatability and minimum detection limit of the whole set of instruments. By setting a reasonable optical path, the sensitivity and repeatability index of the optical response of the ultraviolet sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/05G01N21/33G01N30/74
Inventor 尹杨青高美丽周宇
Owner ANHUI WAYEE SCI & TECH CO LTD
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