Liquid concentration detection apparatus and method for liquid concentration detection by using same
A liquid concentration and detection device technology, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of complex structure, difficulty in miniaturization, poor stability, etc., and achieve low cost, convenient processing, and structural simple effect
Active Publication Date: 2013-06-19
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, and the average pore diameter of the porous medium 1 is about 1 μm;
[0036] At the same time, the TiN-plated stainless steel mesh electrode is selected as the first and second mesh electrodes 3 and 3' that can freely pass through the liquid, and the first and second mesh electrodes 3 and 3' are squares with an average side length of 6 cm, and One side of the square protrudes a 1cm wide and 2cm long electrode lead piece, which is used to connect with the two poles of the DC power supply; engrave the shape of the porous electrode 3 and 3' in the center of the two square PC boards with a side length of 8cm, 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 ...
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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 liquid concentration under the condition of applying voltage. Background technique [0002] Liquid concentration sensors are widely used in various fields of chemistry and chemical industry. At present, they can be divided into two categories: physical sensors and chemical sensors. 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. [0003] In addition, for systems such as DMFC and microreactor, it is necessary to have a fluid delivery device and a concentration measurement device at the same time. Generally, these two devices are independent of each other. If there is a device that can monitor t...
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