Liquid core waveguide flow-through cell for UV spectrophotometric detector

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...

AI Technical Summary

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

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