Flow cell and liquid chromatograph having same

Abstract

The present invention discloses a flow cell and a liquid chromatograph having the same. The flow cell comprises a housing, a cell core, a liquid core waveguide, an inlet connection module and an outlet connection module. The housing is configured to limit an installation cavity, and the cell core is arranged in the installation cavity and is internally provided with a liquid channel, a liquid inlet tank and a liquid outlet tank. The two ends of the liquid channel respectively communicate with the liquid inlet tank and the liquid outlet tank, the liquid inlet tank penetrates an inlet pressing block, the liquid inlet tank communicates with the liquid outlet tank, an incident light tube penetrates the inlet pressing block, the incident light tube communicates with the liquid inlet tank, and the outlet connection module is butted against one end, provide with the liquid outlet tank, of the cell core. The outlet connection module is provided with a light emitting hole directly facing the liquid outlet tank. According to the embodiment of the invention, the flow cell can reduce the possibility of energy loss and generation of stray light so as to improve the detection precision 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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