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Potentiometric titration instrument

A potentiometric titration and titration technology, which is applied in the direction of chemical analysis, material electrochemical variables, and material inspection products by titration, to achieve the effects of convenient program modification, strong flexibility, and good parallelism

Inactive Publication Date: 2004-11-17
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Through domestic and foreign document retrieval, do not see the bibliographical report that main technical feature is identical with a kind of potentiometric titrator main technical feature of the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The computer enters the application program, and after the online initialization with the potentiometric titrator host computer of the present invention, all titration conditions are given on the computer. Weigh 1.512g of refined diesel oil into a 150ml clean and dry low-mouth beaker, add 80mL of xylene-anhydrous acetic acid (1:1) mixed solvent prepared in advance, and start the stirrer. After the sample is dissolved, the computer controls the 0.02047M perchloric acid standard solution to titrate at a volume interval of 0.05-0.10mL, the titrator automatically finds the end point, and the calculation module automatically calculates and displays the basic nitrogen content of 449μg / g Curve, potential change rate curve. Titrate with the same method to obtain a blank value of 0.05mL. The volume of titrant consumed at the endpoint was 2.40 mL.

Embodiment 2

[0073] After the electrode is soaked and pretreated, it is inserted into the measurement cell and initialized online. Weigh 0.4489g of mixed oil into a 150ml clean and dry low-mouth beaker, add 80mL of xylene-anhydrous acetic acid (1:1) mixed solvent prepared in advance, and start the stirrer. After the sample is dissolved, the computer controls the 0.02047M perchloric acid standard solution to titrate at a volume interval of 0.05-0.10mL, the titrator automatically finds the end point, and the calculation module automatically calculates and displays the basic nitrogen content of 1044μg / g Curve, potential change rate curve. Titrate with the same method to obtain a blank value of 0.12mL. The titrant volume consumed at the endpoint was 1.87 mL.

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Abstract

The potential titrator includes liquid sucking titration unit, data collecting and converting unit, driving unit, computer and application software. It has modular structure, in which the system unit and computer are connected serially for communication and the whole control process and data processing are performed via software automatically. The titrator can display real-time titration curve, terminate titration and display test data automatically, and is suitable for determining alkaline nitrogen content in petroleum and petroleum product and the potential titration of other specimens.

Description

technical field [0001] The invention relates to a potentiometric titrator. Background technique [0002] Chinese patent CN 2384221 (99236433.7) discloses a multifunctional microcomputer-controlled automatic titrator. Drive the stepping motor of the liquid adding device to add liquid to the titration tank, there are two ways of photometric titration and potentiometric titration. [0003] CN 2258989 (96225056.2) discloses an electronic titrator, which includes four parts: titration, solution stirring, titration endpoint and circuit control. It is connected with the liquid addition valve switch, the titration speed regulator, and the titration switch key. The solution stirring part includes a micromotor with a magnetic block fixed on the machine shaft, and there is a magnetic stirring sinker in the solution container. The titration end point control part includes a color distinguishing device. The darkroom of the device, the circuit control part is composed of monostable trig...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N31/16G01N33/28
Inventor 陆克平吴荣坤汪文强姜学国陈亚华孔令春王根忠
Owner CHINA PETROLEUM & CHEM CORP
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