Flow cell and liquid chromatograph having same

Abstract

The invention discloses a flow cell and a liquid chromatograph having the same. The flow cell includes a casing, a pool core, a liquid core waveguide, an inlet connection assembly and an outlet connection assembly. The housing defines an installation chamber, and the pool core is arranged in the installation chamber. The pool core is provided with a liquid channel, a liquid inlet tank and a liquid outlet tank. The two ends of the liquid channel are respectively connected to the liquid inlet tank and the liquid outlet tank. in the liquid channel. The inlet connection assembly includes an inlet briquetting block, a liquid inlet pipe and an incident light pipe. The groove is connected, the incident light pipe is installed on the inlet press block and the incident light pipe is connected with the liquid inlet groove, and the outlet connection assembly is pressed against the end of the cell core provided with the liquid outlet groove. A light outlet hole facing the liquid outlet groove is arranged on the outlet connection component. According to the flow cell of the embodiment of the present invention, the possibility of energy loss and stray light generation is reduced, thereby improving the detection accuracy of the liquid concentration.

Description

technical field [0001] The invention relates to the field of sample detection and analysis equipment, in particular to a flow cell and a liquid chromatograph with the same. Background technique [0002] High performance liquid chromatography (HPLC) is often used in sample detection and analysis, as well as in the process of sample separation and purification. The ultraviolet spectroscopic detector is a core component of the high performance liquid chromatography, and the flow cell is the core component of the ultraviolet spectroscopic detector. [0003] The existing ultraviolet spectroscopic detector, the flow path and optical path design adopted by different manufacturers of the flow cell, most of the internal structure is made of SS316L stainless steel parts, in the actual use of the liquid chromatograph, the small hole on the stainless steel part The smoothness of the liquid is usually only 0.8. Due to the scattering of the light by the liquid and the deviation of the ex...

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Problems solved by technology

[0003] Existing ultraviolet spectroscopic detectors, the flow path and optical path design adopted by different manufacturers of the flow cell, most of the internal structure are processed by SS316L stainless steel parts, in the actual use of liquid chromatography, the small holes on the stainless steel parts The smoothness of the liquid is usually only 0.8. Due to the scattering of the light by the liquid and the deviation of the external light path, the light in the absorption area of ​​the flow cell is inconsistent and should not be irradiated on the inner wall of the small hole, resulting in large stray light and loss of light energy.

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

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