An analytical metering device and a liquid analysis system

Abstract

The invention discloses an analyzing and metering device and a liquid analysis system, relating to the technical field of fluid analysis and aiming to achieve accuracy in metering of liquids in different volumes, thus improving the measurement accuracy of the liquid analysis system. The analyzing and metering device mainly comprises a first control valve, a second control valve, a reaction analysis device and a fluid driver, wherein the first control valve comprises a public port and a plurality of distribution ports which can be alternatively communicated with the public port; the plurality of distribution ports include air ports communicated with the atmosphere; the second control valve comprises a first metering pipe and a second metering pipe; one port of the second control valve is connected with the public port by a first connecting pipe; the reaction analysis device is provided with a first channel opening; the first channel opening is connected with the other port of the second control valve by a second connecting pipe; the fluid driver is connected with the reaction analysis device; the inner diameters of the first and second metering pipes and the first and second connecting pipes are less than 4mm. The analyzing and metering device is mainly used in the technical field of chemical analysis instruments.

Description

technical field [0001] The invention relates to the technical field of fluid analysis, in particular to an analysis metering device and a liquid analysis system. Background technique [0002] In chemical analysis instruments, the design of liquid metering system is extremely important, which directly affects the accuracy of analysis results. Existing liquid analysis systems are generally equipped with an analysis and metering device for measuring the collected liquid samples, and the liquid is accurately metered by the analysis and metering device to ensure the measurement accuracy of the liquid analysis system. [0003] In the prior art, the liquid storage unit is often used for the transfer of the liquid metering method. However, when the volume of the liquid in the reaction analysis device is larger than the volume of the liquid storage unit in this metering method, more than one transfer operation needs to be performed back and forth. These transfer steps Not only is it...

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Problems solved by technology

[0003] In the prior art, the liquid storage unit is often used for the transfer of the liquid metering method. However, when the volume of the liquid in the reaction analysis device is larger than the volume of the liquid storage unit in this metering method, more than one transfer operation needs to be performed back and forth. These transfer steps Not only is it complicated and time-consuming, but it is also easy to leave a liquid film or even droplets on the inner wall of the liquid storage unit, which affects the measurement accuracy of the analysis system

And due to the inflexible use of this measurement method, it is difficult to achieve accurate measurement of different volumes of micro-liquid

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