A kind of pneumatic stirring device and using method
A technology of pneumatic stirring and storage bag, which is used in chemical analysis, material analysis, instruments, etc. by titration method, which can solve the problems of accelerating electrolyte mass transfer, affecting response signals, and low titration efficiency, avoiding interference and achieving a degree of automation. High, simple structure
Active Publication Date: 2019-03-15
YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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Problems solved by technology
[0002] Based on capacitive coupling non-contact conductivity sensor (C 4 D) The miniature electronic titrator for on-line monitoring of the change in the conductivity of the reaction solution uses a slender insulating material tube with an inner diameter of no more than 2.0 mm as a disposable titration reaction vessel. At present, there is no suitable stirring measure to speed up the mass transfer of the electrolyte in the reaction solution. resulting in lower titration efficiency
If an electromagnetic stirrer or ultrasonic vibration is used for stirring, electromagnetic pollution will inevitably occur, which will seriously affect the C 4 D’s response signal, causing measurement error
Method used
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Embodiment 1
[0026] A pneumatic stirring device used for stirring the reaction solution in the micro titration process, used in conjunction with a micro electronic titrator, such as figure 1 As shown, it includes an air storage bag 1, an air guide tube 2, a solenoid valve 3, a single-chip microcomputer 4, an air intake needle 5 and a data line 6. about 1.6m 3 Air at 1.10-1.32 atmospheric pressure, or nitrogen, is installed in the elastic air storage bag, between the air storage bag and the miniature normally closed solenoid valve (GLE2010-W24-1, Beijing Jadelight Technology Co., Ltd.), between the miniature normally closed solenoid valve and the The quartz glass inlet needles are connected through a silicone gas guide tube with an outer diameter of 2 mm and an inner diameter of 0.8 mm; according to the titration system titrant sending cycle and C 4 The D signal acquisition period sets the duration and frequency of ventilation, and the micro-normally closed solenoid valve is controlled by ...
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The invention discloses a pneumatic stirring device and a using method, and belongs to the field of analysis and test instruments. The pneumatic stirring device comprises an air storage bag, air ducts, an electromagnetic valve, a singlechip, a data wire and an intake needle; the air storage bag is connected with the electromagnetic valve by an air duct, the electromagnetic valve is connected with the intake needle by an air duct, and according to the titration stirring requirement, the singlechip transmits signals via the data wire to control the action of the electromagnetic valve so as to control the ventilation time length and cycle of the pneumatic device. Gas which does not influence the chemical reaction is injected from the bottom, and the reaction solution is stirred to accelerate the mass transfer process of materials in the solution, so that the titration efficiency is improved; and the pneumatic stirring device is simple in structure and high in automation degree, and does not bring electromagnetic pollution.
Description
technical field [0001] The invention belongs to the field of analytical testing instruments, and in particular relates to a reaction solution stirring device, which is a core part of a miniature electronic titrator. The device can automatically stir the reaction solution according to the titration action of the electronic titrator, so as to improve the titration efficiency. Background technique [0002] Based on capacitive coupling non-contact conductivity sensor (C 4 D) The miniature electronic titrator for on-line monitoring of the change in the conductivity of the reaction solution uses a slender insulating material tube with an inner diameter of no more than 2.0 mm as a disposable titration reaction vessel. At present, there is no suitable stirring measure to speed up the mass transfer of the electrolyte in the reaction solution. As a result, the titration efficiency is low. If an electromagnetic stirrer or ultrasonic vibration is used for stirring, electromagnetic poll...
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IPC IPC(8): G01N31/16G01N35/00
CPCG01N31/16G01N35/00G01N2035/00534
Inventor 曲克明张旭志单秀娟张艳赵俊陈聚法李秋芬丁东生
Owner YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI