Automatic sample injector having bottle pressing function and liquid chromatograph

Abstract

The invention relates to an automatic sample injector having a bottle pressing function and a liquid chromatograph. The automatic sample injector comprises a rack having a sampling pin fixing component for installing a sampling pin. In addition, the automatic sample injector also includes two guide rods, a stop block, and two compressing springs. Two guide holes are symmetrically arranged at the rack at the two sides of the sampling pin fixing component and each of the guide rods passes through one guide hole; a limit structure is arranged at one end, arranged above the guide hole, of each of the guide rods; and the other end of each of the guide rods is fixedly connected with the stop block. The two compressing springs are respectively sleeved at the two guide rods and are arranged between the rack and the stop block; and the compressing springs are in a compression state under the effects of the limit structures, the rack and the stop block. And a through hole corresponding to the sampling pin is arranged in the middle of the stop block. According to the provided automatic sample injector, fixing of sample bottles with different heights is realized; and the fixing effect is good.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to an automatic sampler and a liquid chromatograph, in particular to an automatic sampler and a liquid chromatograph with a bottle pressing function. Background technique [0002] In the field of measurement and testing, a liquid chromatograph is an instrument that uses chromatography to separate and analyze the various components of a mixture to determine some physical and chemical properties of a substance. Liquid chromatography uses solid or liquid as the stationary phase and liquid as the mobile phase. It is mainly used to analyze organic compounds with high boiling point, non-volatile, unstable and easy to decompose when heated, large molecular weight and different polarity, biologically active substances and polysaccharides. natural products, synthetic and natural polymers, etc. [0003] combined reference figure 1 , taking the liquid chromatograph 100 as an ...

AI Technical Summary

Problems solved by technology

[0012] However, in order to be able to fix the sample bottle 203, the L-shaped bottle holder 206 is generally made of sheet metal or metal parts, and is fixed with the frame. The structure is very firm. In the L-shaped bottle holder 206 When pressing the bottle, rigid resistance is produced to fix the sample bottle 203, which makes the L-shaped bottle pressing frame 206 only fix a sample bottle 203 of a height compatible with the L-shaped bottle pressing frame 206 , and the existing sample bottle 203 is also different in height due to different volumes. At this time, the L-shaped bottle pressing rack 206 cannot meet the demand

[0013] Therefore, the L-shaped bottle holder 206 of the existing liquid chromatograph 100 and the autosampler 103 cannot realize the fixing effect on the sample bottles 203 with different heights, and cannot meet the demand

Images