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Embedded type magnetic stirring device

A magnetic stirring device and magnetic stirring technology are applied in the directions of dissolution, mixer, chemical instrument and method, etc., which can solve the problems of poor reproducibility, easy change of the relative position of the stirring device, insufficient stirring, etc., to eliminate influence and save energy. To clean the magnetic stirring bar, the effect of small volume

Inactive Publication Date: 2013-11-27
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that the relative position of the stirring device in the prior art is easy to change, the reproducibility is poor, and the stirring is insufficient, the present invention provides an embedded magnetic stirring device

Method used

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  • Embedded type magnetic stirring device
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  • Embedded type magnetic stirring device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 adopts embedded magnetic stirring device of the present invention for heavy metal ion Pb 2+ and Cd 2+ Measurement reproducibility check

[0019] The bottom solution of the electrolytic cell is a buffer solution of 0.1M sodium acetate and acetic acid (pH=4), and the substance to be tested is Pb 2+ and Cd 2+ solution, the concentration is 20ppb, the working electrode is a glassy carbon electrode coated with bismuth in situ, the reference electrode is silver / silver chloride, and the counter electrode is a platinum wire electrode. Using differential pulse stripping voltammetry, the potential increment is 0.005V, the amplitude is 0.08V, the pulse width is 0.01s, and the deposition is under stirring conditions for 120s. The experiment is repeated twice, and after each test is completed, at +0.3V potential The electrodes were cleaned for 30 s, and the reproducibility of the measurement results of the two experiments was compared. Depend on image 3 It can be ...

Embodiment 2

[0020] Embodiment 2 The test of the stirring function of the embedded magnetic stirring device of the present invention

[0021] The bottom solution of the electrolytic cell is a buffer solution of 0.1M sodium acetate and acetic acid (pH=4), and the substance to be tested is Pb 2+ and Cd 2+ solution, the working electrode is a glassy carbon electrode coated with bismuth in situ, the reference electrode is silver / silver chloride, and the counter electrode is a platinum wire electrode. Using differential pulse stripping voltammetry, the potential increment is 0.005V, the amplitude is 0.08V, and the pulse width is 0.01s. The deposition is 120s under stirring and non-stirring conditions respectively. After each test is completed, the electrode is cleaned at a potential of +0.3V 30s, investigated the heavy metal ion Pb under unstirred and stirred conditions 2+ and Cd 2+ stripping voltammetric response. Depend on Figure 4 (Pb 2+ and Cd 2+ The concentration is 20ppb) and Fi...

Embodiment 3

[0022] Embodiment 3 adopts embedded magnetic stirring device of the present invention for heavy metal ion Pb 2+ and Cd 2+ Electrochemical determination of

[0023] The bottom solution of the electrolytic cell is a buffer solution of 0.1M sodium acetate and acetic acid (pH=4), and the substance to be tested is Pb 2+ and Cd 2+ , the working electrode is a glassy carbon electrode coated with bismuth in situ, the reference electrode is silver / silver chloride, and the counter electrode is a platinum wire electrode. Using differential pulse stripping voltammetry, the potential increment is 0.005V, the amplitude is 0.08V, the pulse width is 0.01s, the test concentration is 5ppb, 10ppb, 20ppb, 40ppb, 60ppb, 80ppb and 100ppb, deposited under stirring conditions for 120s, After each test is completed, the electrode is cleaned at the potential of +0.3V for 30s, and the test of the next concentration is continued, and the heavy metal ion Pb at different concentrations is investigated. ...

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Abstract

An embedded type magnetic stirring device relates to a stirring device, which aims at solving the problem that a relative position of an existing stirring device is easy to change, reappearance performance is poor, and stirring is not sufficient. The device comprises a device body base, an electrolytic cell and a fixed cup cover. A square connector is arranged on the inner side of the upper portion of the device body base, the electrolytic cell is fixed at the upper portion of the device body base, and the fixed cup cover is covered on the electrolytic cell and is fixed with the device body base through the square connector. The device further comprises a miniature controllable motor, a magnetic stir bar and a permanent magnet. The miniature controllable motor is embedded in a circular groove at the bottom of the device body base, the magnetic stir bar is movably arranged at the bottom of the electrolytic cell, and the permanent magnet is fixed on the miniature controllable motor. By means of reasonable structural design, the embedded type magnetic stirring device eliminates the influence of relative positions on test results, enables the test results to have reliability and reproducibility, an embedded type magnetic stirring method facilitates sufficient stirring, and the step of cleaning the magnetic stir bar is omitted.

Description

technical field [0001] The invention relates to a stirring device, in particular to an embedded magnetic stirring device. Background technique [0002] Many data determinations in terms of chemical kinetic properties require stirring and speed control devices, especially for the detection of heavy metal ions by anodic dissolution methods. The reasonable application of stirring and speed control will improve the sensitivity of detection. For the quantitative analysis of trace heavy metals It is very important in medicine, food, clinical and environmental testing. The present invention designs an embedded magnetic stirring device under such background. The existing devices for stirring and testing in the laboratory are generally roughly constructed by electrolytic cups, magnetic stirrers and workbenches. Huge, separated from the electrolytic cell body, it is difficult to ensure that the experimental conditions are consistent every time, which affects the reliability and repr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/28B01F13/08
Inventor 韩彦超夏勇李敬贾小芳李冬月
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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