Continuous liquid sample injection system and control method thereof

Abstract

The invention discloses a continuous liquid sample injection system and a control method thereof. The continuous sample injection of samples is realized by using two or more injection pumps. The system comprises two or more multi-channel rotary valves of which the number is same as that of the injection pumps, the liquid outlet of each injection pump is connected with a liquid path inlet of the multi-channel rotary valve corresponding to the injection pump, and each multi-channel rotary valve comprises at least two liquid path outlets, wherein one liquid path outlet corresponds to a sample source, and the other liquid path outlet corresponds to a detection chamber; and the liquid path outlets, corresponding to the sample source or the detection chamber, of all the multi-channel rotary valves are converged together through a pipeline and then are communicated with the sample source or the detection chamber. The system and the control method provided by the invention can overcome the problem that a single injection pump cannot realize the continuous sample injection, and realize the continuous, accurate and stable sample injection on the premise of protecting vulnerable samples.

Description

technical field [0001] The invention belongs to the technical field of automatic detection, and particularly relates to a liquid sampling system, especially a system capable of realizing continuous sampling of liquid samples and avoiding damage to samples of suspended particles in the liquid. Background technique [0002] In many disciplines such as life science, environmental science, marine science and medicine, soluble substances in liquids, such as chemical components such as metal elements and inorganic salts, or suspended particles in liquids, such as unicellular, multicellular micro organisms, cells Biological particles such as populations and non-biological particles such as microplastic particles are important research objects, and are of great significance to the detection and analysis of the above research objects. Flow-through liquid detection and analysis is the process of realizing rapid detection and analysis of the above objects. Compared with traditional de...

AI Technical Summary

Problems solved by technology

However, limited by the working principle of the syringe pump itself, there is currently no continuous working flow-through detection instrument based on the syringe pump used in the imaging detection of biological particles.

At the same time, the existing flow-through detection instruments usually lack the design of the liquid circuit and its control in the case of suspended particles in the liquid sample. For example, the lack of pipeline design and safeguard measures will make the instrument not normally applicable to specific monitoring scenarios.

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