Full-automatic mobile phase bubble separation device

Abstract

The invention discloses a full-automatic mobile phase bubble separation device, which comprises a tubular capturing trap, wherein a mobile phase liquid dripping passage is formed in an upper cover at the upper end of the tubular capturing trap; a guide device is arranged at the lower end of the upper cover, and a clearance is formed between the guide device and the periphery of the tubular capturing trap; the lower end opening of the mobile phase liquid dripping passage is positioned on the outer wall of the guide device; the mobile phase liquid dripping passage is connected with an upper perfusion pipe, and the lower end of the tubular capturing trap is provided with a mobile phase liquid drop outlet and connected with a lower perfusion pipe; and upper and lower liquid level sensors are arranged on the side walls of the tubular capturing trap respectively, the side wall of the tubular capturing trap is provided with an air outlet and connected with an air extraction pressure-keeping pump through a pipeline, and the upper and lower liquid level sensors are electrically connected with the air extraction pressure-keeping pump through a control loop. The device realizes separation of visible bubbles and liquid in the falling process of the mobile phase liquid drops, enables the mobile phase liquid drops to slowly flow down along the inner wall of the tubular capturing trap, and can effectively prevent the mobile phase liquid drops from directly dripping into the liquid level at the lower end of the tubular capturing trap.

Description

technical field [0001] The invention relates to a fully automatic mobile phase bubble separation device. Background technique [0002] The chromatographic pump is one of the main components of high-pressure ion chromatography. The chromatographic pump pumps the mobile phase into the analysis system at a constant flow rate under high pressure, and is the power source of the entire analysis system. Chromatographic analysis must be under the same conditions of analysis in order to obtain accurate analysis results. [0003] If air bubbles enter when the chromatographic pump is working, the actual flow rate of the system will change, the pressure will drop, and the analysis process will fail. At this time, the chromatographic pump must be shut down to discharge the air bubbles, and then the test can be retested. However, the entire analysis system has changed at this time. In order to obtain accurate data, the analysis work needs to be restarted, which is time-consuming and labo...

AI Technical Summary

Problems solved by technology

However, the entire analysis system has changed at this time. In order to obtain accurate data, it is necessary to restart the analysis work, which is time-consuming and laborious.

At present, ion chromatography is basically equipped with an online degassing device. The online degassing device adopts the principle of gas-liquid membrane separation, which can remove part of the dissolved gas dissolved in the mobile phase. Since the main components of the online degassing are expensive imported components, The manufacturer only considers the removal of part of the dissolved gas in the mobile phase when designing, but cannot remove the visible air bubbles in the flow path before the pump

[0004] The mobile phase of ion chromatography is mostly an aqueous solution of millimolar weak acid or weak base. On the one hand, when the ambient temperature rises, the dissolved gas in the mobile phase will continuously precipitate and adhere to the outer wall of the container and pipeline, and some will be sucked into the chromatography. On the other hand, when the content of dissolved gas in the mobile phase is too high, some tiny bubbles will be precipitated after entering the pump pipeline, and will be sucked into the pump head under the suction of the chromatographic pump, resulting in interruption of analysis

In addition, if the sintered filter head connected to the liquid inlet pipe of the chromatographic pump is partially blocked by impurity particles in the mobile phase, visible bubbles will also be generated in the liquid inlet pipe when the chromatographic pump is working, and finally enter the chromatographic pump, causing the analysis work to be interrupted

The gas-liquid separator currently in the market adopts the method of directly dropping liquid droplets, and manually removes the gas in the air trap, which causes the experimenters to pay attention at all times. exclusion, will cause a large amount of gas to be sucked into the chromatographic pump, resulting in interruption of analysis

If the gas content in the mobile phase is high during work, a large number of tiny bubbles will be generated at the moment of impact when dropping, and some of them may also be impacted into the outlet of the mobile phase, and finally sucked into the pump, resulting in the interruption of the analysis process

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