A liquid concentration detection device and a method for detecting liquid concentration using the same
A liquid concentration and liquid technology, applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of complex structure, poor stability, and difficulty in miniaturization, and achieve low cost, simple structure, and convenient processing Effect
Active Publication Date: 2016-01-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
Physical sensors have a wide range of measurement, but their structures are complex and difficult to miniaturize; chemical sensors are easy to miniaturize, but their long-term operation stability is not good
Method used
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Embodiment 1
[0035] A circular sintered porous glass plate with a thickness of 4.5 mm and a diameter of 4 cm is selected as the porous medium 1. The average pore diameter of the porous medium 1 is about 1 μm;
[0036] At the same time, TiN-plated stainless steel mesh electrodes are selected as the first and second mesh electrodes 3 and 3'for free passage of liquid, and the first and second mesh electrodes 3 and 3'are squares with an average side length of 6cm, and One side of the square protrudes a 1cm wide and 2cm long electrode lead sheet, which is used to connect with the two poles of the DC power supply; in the center of the two square PC boards with a side length of 8cm are engraved with porous electrodes 3 and 3'. Grooves of the same size are used to fix the first and second mesh electrodes 3 and 3';
[0037] The porous medium 1 is fixed by the first and second sealing frames 2 and 2'. The first and second sealing frames 2 and 2'are square PC boards with a side length of 8cm engraved with...
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Abstract
The invention relates to a liquid concentration detection apparatus, comprising a plate-shaped porous medium and two plate-shaped electrodes allowing liquid to vertically pass through, wherein the two plate-shaped electrodes are respectively and correspondingly arranged at two sides of the porous medium. To-be-measured liquid contacts with the wall surface of the porous medium to form a double-electrode layer; ions in a diffusion layer of the double-electrode layer carry out directional migration under the action of an external electric field, and the ions in directional migration drag surrounding liquid to move forward so as to form electroosmotic flow. The liquid concentration detection apparatus provided by the invention can be cooperatively used with a fuel cell and a plurality of reactors to realize real-time monitoring of liquid concentration during conveying of a liquid reactant or product and can also be individually used as a concentration detector. The liquid concentration detection apparatus has the advantages of good versatility, a wide application scope, a simple structure, convenience in processing, low cost and capacity of realizing detection of liquid concentration under a variety of conditions.
Description
Technical field [0001] The invention belongs to the technical field of liquid concentration detection, and in particular relates to a liquid concentration detection device, which can be used as a concentration sensor to detect the liquid concentration under the condition of voltage application. Background technique [0002] Liquid concentration sensors are widely used in various fields of chemistry and chemical engineering. At present, they can be divided into two categories: physical sensors and chemical sensors. The physical sensor has a wide measuring range, but the structure is complex and it is not easy to miniaturize; the chemical sensor is easy to miniaturize, but its stability in long-term operation is not good. [0003] In addition, for systems such as DMFC and microreactors, both a fluid delivery device and a concentration measurement device are required. Generally, these two devices are independent of each other. If there is a device that can monitor the concentration o...
Claims
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IPC IPC(8): G01N27/403G01N27/49
Inventor 孙公权杨林林孙海王素力姜鲁华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI