Flow cell

Abstract

The invention discloses a flow cell, which comprises a cell body, and a to-be-detected sample is detected in the cell body, wherein the cell body comprises a sample inlet and a sample outlet; the to-be-detected sample enters into the flow cell from the sample inlet and flows out of the flow cell through the sample outlet; a liquid layer in certain thickness is formed by the to-be-detected sample at the bottom of the flow cell.

Description

technical field [0001] The embodiments of the present invention relate to the field of liquid detection, in particular to a flow cell for liquid detection. Background technique [0002] Liquid detection is an important part of the reprocessing industry. For example, in the Purex Process (Purex Process) used in the nuclear fuel water reprocessing process, it is necessary to check the uranium content of the reprocessing liquid during the co-decontamination and separation cycle. Analysis to keep abreast of process conditions and adjust process parameters accordingly. [0003] Raman spectroscopy is a new method for the detection of uranium content. It uses the Raman intensity of substances with Raman activity to analyze and correlate with the concentration of substances, and the measurement accuracy is high. The flow cell is the core component of the on-line detection of Raman spectroscopy, which is used to accommodate the flow of the post-processing liquid in it and be detecte...

AI Technical Summary

Problems solved by technology

[0004] However, the strong radioactivity and corrosiveness of the post-treatment liquid greatly affect the optical performance and service life of the detection instrument; at the same time, Raman spectroscopic analysis requires the spot to fall in the solution, and the droplets and bubbles generated during the flow of the solution And the fluctuation of the liquid level will cause the deviation of the uranium content test results; and, in the existing "┷" type flow cell, the solution is easy to form a laminar flow in the horizontal tube, so that the radioactivity will accumulate in the flow cell, and the radioactive background will be reduced. High, and the structure of the horizontal tube is not conducive to the exhaustion of the residual liquid in the flow cell; in addition, the online analysis also requires the liquid to maintain a high flow rate in the flow cell, can be updated in time, and the dead volume is small

The above factors limit the application of Raman spectroscopy in the detection of liquids in the post-processing industry

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