Device for carrying out long-time continuous optical monitoring on liquid concentration

Abstract

The invention discloses a device for carrying out long-time continuous optical monitoring on liquid concentration, which is characterized in that a movable sleeve is internally hermetically fixed with a light-transmitting lens and provided with a first plunger piston and a second plunger piston; the first plunger piston and the second plunger piston are respectively positioned at both sides of the light-transmitting lens and form dynamical seal with the movable sleeve; cavities of the first plunger piston and the second plunger piston are respectively internally hermetically fixed with a plunger piston lens, and the central axes of the two plunger piston lenses are coincided; the outer ends of the first plunger piston and the second plunger piston are respectively fixedly connected with a fixed supporting seat; the length of the movable sleeve is more than double longer than the distance between the plunger piston lens of the first plunger piston and the plunger piston lens of the second plunger piston; a reference solution cavity is formed between the inner end surface of the plunger piston lens of the first plunger piston and the light-transmitting lens, and a solution (to be measured) cavity is formed between the inner end surface of the plunger piston lens of the second plunger piston and the light-transmitting lens; the wall of the movable sleeve is provided with a solution (to be measured) injection / discharge port and a reference solution injection / discharge port, and the solution (to be measured) injection / discharge port and the reference solution injection / discharge port are correspondingly communicated with the solution (to be measured) cavity and the reference solution cavity.

Description

Technical field [0001] The invention relates to an optical analysis instrument, in particular to an optical detection device for monitoring liquid concentration. Background technique [0002] The traditional optical detection principle is based on the Lambert-Beer law, which detects the intensity of the emitted light and the received light, and determines the concentration of the analyte according to parameters such as the absorption constant and the optical path. However, the aging effect of the light source will inevitably cause the slow drift of the emitted light intensity, and the aging and corrosion of the emitting end and the receiving end lens will cause errors in the received light intensity detection. Therefore, it is not suitable for long-term continuous monitoring of liquid concentration. In addition, traditional spectrophotometric testing equipment must be calibrated regularly to ensure the accuracy and reliability of testing results. Regular offline calibration is ...

AI Technical Summary

Problems solved by technology

However, due to the aging effect of the light source, the slow drift of the emitted light intensity will inevitably be caused, and the aging and corrosion of the lenses at the transmitting end and the receiving end will cause errors in the detection of the received light intensity.

Therefore, it is not suitable for long-term continuous monitoring of liquid concentration

In addition, traditional spectrophotometric detection equipment must be calibrated regularly to ensure the accuracy and reliability of test results

Regular offline calibration will inevitably interrupt the continuity of detection. If the calibration cycle is short and frequent, the practicability and applicability will be poor; if the calibration cycle is long, the detection accuracy cannot be guaranteed.

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