Accurate quantitative control reagent sample suction and pipetting device

Abstract

The invention discloses an accurate quantitative control reagent sample suction and pipetting device, and aims to provide a pipetting device capable of quantitatively sucking a liquid once, quantitatively spraying the liquid for multiple times and replacing a suction head. The device is characterized in that a pipette pipettor and a dropper pipettor are respectively provided with a pipette pneumatic cylinder piston connecting rod connected with a pipette piston rod positioning controller and a dropper pneumatic cylinder piston connecting rod connected with a dropper piston rod positioning controller; a pipette piston air cylinder and a dropper piston air cylinder are respectively communicated with a pipette and a dropper through a pipette pressure conveying channel and a dropper pressure conveying channel; and the pipette and the dropper are detachably connected in a sealed mode through a pipette sealing connector and a dropper sealing connector which are arranged at the outlet end ofthe pipette pressure conveying channel and the outlet end of the dropper pressure conveying channel respectively. A stored liquid can be accurately transferred, and the continuous liquid transfer workcan be quickly and conveniently completed. And the sprayed sample and reagent loss is low, and almost no liquid is left.

Description

technical field [0001] The invention relates to an in vitro diagnostic medical instrument and a biochemical laboratory instrument mainly used in genetic engineering reagents and sample pipetting, clinical diagnostic reagents and sample pipetting, industrial chemical pipetting, etc., which can meet the requirements for different target sequences Precise quantitative control reagent suction and pipetting device required for liquid surface contact sequencing and result analysis. Background technique [0002] Biochemical reagents and immune biochemical reagents are biological materials or organic compounds related to life science research, as well as reagents for clinical diagnosis and medical research. There are many types of biochemical reagents, including immune reagents, genetic engineering reagents, clinical diagnostic reagents, industrial chemical reagents, additives, auxiliary reagents and other related reagents, among which immune reagents include antibodies and antiseru...

AI Technical Summary

Problems solved by technology

[0005] Contact sampling with replaceable tips can only be applied to the first addition of samples or reagents in an empty reactor, and the tips must be discarded after adding samples or reagents, otherwise it will cause sample or reagent contamination

Problems and defects such as large amount of tips used, large waste, frequent replacement of tips, low work efficiency, and large loss of reagents and samples

[0006] 2. Non-replaceable tip cleaning non-contact sample addition

[0007] For cleaning non-contact sampling, it can only be applied to occasions where laboratory equipment does not require high reagent contamination.

Since the tip cannot be replaced, there is a certain amount of residue when the tip is cleaned, so it is not suitable for adding test samples

Especially in in vitro diagnostic medical devices, the slightest cross-contamination is not allowed, and this kind of sampling method has great limitations

Images