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Upper and lower electrode rods for spectral analysis

Emission spectrum analysis is based on the principle that the excitation of elements or compounds is the specific wavelength of the spectrum. The sample is heated or electrified to make it emit light, the position and intensity of spectral lines are measured, and the elements or compounds are quantitatively analyzed, which are widely used in various analytical researches.


The electrode for spectral analysis has the following characteristics:

It is a good conductor of electricity and heat

It has very few spectral lines of its own

It has proper mechanical strength and machinability

It must be of high purity, especially in the qualitative analysis of trace elements, even the slightest impurity is not allowed to exist.

Diameter specification: 3.1 mm 4.1 mm 5.1 mm 6.1 mm 8.1 mm

Length: 150 mm, 200 mm, 305 mm

In practical use, it is usually cut into 30-50 mm length. When it is used as the upper electrode, the front end will be processed into a cone; when it is used as the lower electrode, a small hole for loading the sample will be processed in the front end. The specific shape can be customized according to the nature of the sample and the purpose of the experiment.

It can be divided into Regular Grade and Special Grade.

Regular Grade products only contain trace amounts of certain elements (mainly mg, Si, B, Fe), which can be used for qualitative or quantitative analysis of elements other than its impurities.

Special Grade product is a high purity refined product which can hardly detect impurities in spectral analysis. The uniformity of its structure is also better than that of regular grade products, and its luminescent state is stable and high uniformity.

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