ATA-1B Rotating Disc Electrode Laboratory Instrument and Equipment

NegotiableUpdate on 01/12

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

ATA-1B rotating disk has high rotational speed; Continuously adjustable; Accurate measurement and display of rotational speed; Good stability; The electrode can be made of different materials and shapes, and its maximum current and peak height have a good linear relationship with the square root of the rotational speed. It can automatically control the electrode rotation time, greatly simplifying the operation in polarographic analysis. Its sensitivity can reach 10-11M or PPt level. Therefore, it is suitable for use in higher education institutions, scientific research units, environmental monitoring institutions, and industrial and mining industries related to electrochemistry and electroanalysis.

Product Details

Rotating disk electrode

1. The instrument can be continuously used in the following environments after being powered on and rotated for 30 minutes:

① Environmental temperature: 0-40 ℃

② Relative humidity: ≤ 80%

③ Power supply: 50Hz 220V ± 10%

④ No significant vibration or strong electromagnetic field.

2. Speed range 500-8000 revolutions per minute

3. Accuracy: The speed measurement accuracy can reach0.5%± 1 word (full degree)

4. Speed stability: above 1500 revolutions per minute, relative standard deviation is better than 1%

The standard deviation below 1500 revolutions per minute shall not exceed 20

Not exceeding 50 revolutions per minute at 8000 revolutions per minute

5. Radial jump of electrode head ≤0.05mmNo axial movement

6. Insulation resistance between electrodes and other parts>10MΩ

7. The result shows: * 10 level digital display * 10 magnification

The four digit display directly shows the rotational speed per minute

8. Dimensions: 210 × 240 × 320

9. Weight:7.6Kg

10. Power consumption:<25W

3、 Working principle

Rotating disk electrodeWidely used in modern electroanalytical chemistry and electrode kinetics research. Since the 1940s, extensive research has been conducted on the fluid dynamics model and mass transfer equation of rotating disk electrodes, and their strict, limit diffusion current equation is:

Id=0.62nFAD2/3Oh1/2γ-1/6C

Where:

Id：The maximum diffusion current of a disk electrode, A/Cm²

n：Number of electrons involved in electrochemical reactions Cm²/In seconds. F: Faraday's constant.

γ: The dynamic viscosity of a solution.Cm²/In seconds.

ω: The rotational speed of the electrode. Radiance per second.

CThe concentration of the measured ion.

From the equation, it can be seen that the maximum diffusion current Id of the rotating disk electrode has a good linear relationship with the square root of the rotational speed V, as shown by Id versus N½Draw a line with a slope of0.62nFAD2/3γ-1/6CThen the diffusion coefficient D of the reaction particles can be calculated.

δ=1.61D1/3Oh-1/2γ-1/6

Where:

δ: Diffusion layer thickness.

D: The diffusion coefficient of the tested electroactive substance. Cm²/In seconds.

γ: The dynamic viscosity of a solution. Cm²/In seconds.

ω: Rotation speed. Speed per second.

Thus it can be seen,Rotating disk electrodeThe effective thickness δ of the surface diffusion layer is an accurately calculable quantity. Once D, γ, and ω are known, δ can be calculated. The effective thickness δ of the surface diffusion layer of a rotating disk electrode has these advantages, making it widely used in electroanalytical chemistry and industrial production.