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Automatic titration device for analysis instrument

A technology of automatic titration and titration tank, which is applied in the direction of chemical analysis by titration method, can solve the problems of damage to devices in the titration tank, easy residual waste liquid, complicated process, etc., and achieve low production and assembly costs, simple liquid inlet and discharge process, The effect of low system cost

Inactive Publication Date: 2012-05-16
GUILIN OUBO INSTR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. There are too many pipeline connections in the titration tank, which not only increases the number and cost of valves and pumps required for the liquid inlet and discharge system, but also greatly increases the probability of leakage, and also increases the complexity of the installation of the titration tank
[0008] 2. Due to the complexity of the liquid inlet and discharge system, the process of liquid inlet, liquid discharge and titration is complicated
[0009] 3. Since the titration tank is designed with a flat bottom, it is easy to leave waste liquid. In order to ensure the accuracy of the next measurement, it is necessary to consume more clean water to clean the titration tank
Since the cylindrical stirrer is only constrained by magnetic force, when the device is working in a bumpy state such as a ship or a vehicle, the stirrer is easily thrown away from the working position, resulting in stirring failure or damage to the devices in the titration cell
[0011] 5. In the known design where the pipelines are connected from the upper part or the side of the titration tank, because various pipelines occupy the space on the upper part or the side of the titration tank, it is easy to interfere with titration endpoint detection devices such as photometers and electrodes, so This design increases the difficulty of instrument miniaturization

Method used

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  • Automatic titration device for analysis instrument
  • Automatic titration device for analysis instrument
  • Automatic titration device for analysis instrument

Examples

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Embodiment Construction

[0039] Such as image 3 As shown, an automatic titration device that uses an OPR electrode as a determination of the titration end point is used in the titration of potassium dichromate by ferrous ammonium sulfate. The automatic titration device includes: a titration cell 10, a magnetic stirrer 20, and a circular Strong magnetic blocks 31A and 31B, gear wheel 32, bearing pair 33, stirring mechanism housing frame 34, pinion gear 35, motor 36, fastening frame 40, O-ring 41, clamp 42, lower supporting knob 43, Teflon tube 44, compression knob 45, compression spring 46, titration cell cover 47, multi-position valve 50, liquid storage ring 51, liquid inlet detector 52, two-position three-way valve 53 and plunger pump 54 (stepping motor not shown), titration liquid detector 55 and ORP electrode 60.

[0040] The body 11 of the titration cell 10 adopts a cylindrical design with an open upper end, and the material adopts a transparent, corrosion-resistant, and high-strength glass material...

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PUM

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Abstract

The invention discloses a small automatic titration device applied to an analysis instrument. The automatic titration device comprises a titration pool of which the bottom is provided with a unique liquid inlet and outlet opening, an electromagnetic stirring mechanism with a central through hole, an inlet and outlet liquid metering system, a fastening mechanism, a titration endpoint monitoring device and a control and calculation unit. The device can be applied to photometric titration and potentiometric titration, is easy to install and has relatively low cost. The invention also provides a method for titrating by using the automatic titration device and calculating the volume of consumed titrated liquid.

Description

Technical field [0001] The invention relates to a titration device of an analytical instrument, in particular to an automatic titration device. Background technique [0002] Titration is a method of adding a standard solution to the analyzed solution gradually, and determining the reaction end point and analyzing the composition of the solution based on the color, precipitation or conductivity changes caused by the test component, titrant, and reaction product during the titration process. . According to different principles for determining the end point of titration, titration can be divided into photometric titration, potentiometric titration, coulometric titration, etc.; according to different reaction principles, it can be divided into acid-base, redox, precipitation or complexometric titration. [0003] A fully automatic titration device usually includes a titration cell, a liquid inlet and discharge metering system, a mixing and homogenizing device, a titration endpoint dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
Inventor 李志超多英昕
Owner GUILIN OUBO INSTR TECH
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