Metal material element analyzer

The fast analysis speed of the photoelectric direct reading spectrometer in the metal material element analyzer is unmatched by other methods. When analyzing a spectrometer, many elements in a sample can be analyzed simultaneously. In the analysis process, due to the wide variety of analytical samples, the analysts of photoelectric direct reading spectrometers should master the applicable analytical methods according to the analytical tasks, and it should be clear that quantitative analysis mainly has high accuracy (ie, small errors). ). The analysis of the rare earth elements is described below.

One-way spark source emission spectroscopy has been used for the analysis of tantalum elements in steel and aluminum. It is difficult to analyze rare earth elements by traditional wet chemical methods or other instrumental analysis methods. Because the chemical and physical properties of the lanthanum series elements are very similar, and the content in most materials is also very low. Direct reading spectrometer 镧 series analysis is a better method for analyzing steel and aluminum. The rare earth elements in steel and aluminum can be quickly analyzed together with other elements without increasing the cost.

Analysis of rare earth elements in steel:

In the iron-based material, by forming rare earth sulfides and rare earth oxides, rare earth elements can remove sulfide impurities, thereby improving the ductility and ductility of the iron-based material during rolling, and instead affecting toughness. In cast iron, rare earth elements also form rare earth sulfides, which effectively form the state of the spheroidal ink. The amount of rare earth material to be added to the cast iron depends on the amount required to make the carbon element in the cast iron spheroidized. However, most foundries currently use magnesium to treat ductile iron (the price of rare earth elements is relatively expensive). Due to the abundant domestic rare earth resources, rare earth elements are usually added to steel. In principle, tantalum, niobium, etc. are added to the high-strength low-alloy steel to reduce cracks in the laminated structure during the solder joint.

In the application, first select the good element spectrum, formulate the calibration curve, and then study the accuracy and accuracy of the analysis.

The choice of line depends on several factors:

(

1

Instrument manufacturers have experience in selecting spectral lines, and should know which line is suitable for their own optical systems and light sources. The selected line is not disturbed by other element lines in terms of its material matrix.

(

2

) content range. Because the intensity of different spectral lines of an element is different, the spectral line may not meet the range of content proposed by the user, and sometimes two spectral lines need to be selected.

(

3

) mutual interference between elements. When there is a line of another element next to the line side of the analysis element, and the content of the element is high, it will increase the intensity of the element line to be analyzed. Therefore, the analytical content obtained will be higher than the actual. This inter-element interference effect is reduced when selecting spectral lines.

(

4

) Special focus. Usually due to the close proximity of the emission lines, it is sometimes necessary to compensate with optical system components.

The analytical line selection of rare earth elements is carried out according to the above conditions:

Ce416.85594nm

- it is the standard analytical line of bismuth in iron-based materials, usually used

10μm

The slit width is used to reduce the background interference of the iron.

La398.8518nm

- the intensity of the line is greater than

412.3nm

And, there is almost no mutual interference common in steel. Keep away from other lines on the focal plane.

La412.3nm

Very close

Ce

Spectral line.

Nd406.1085nm

- the line is not subject to rare earth elements

410.9nm

The interference of the line is strong at the same time.

Pr422.298nm

- a strong line, but may be subject to

Mo

Interference.

Pr442.9238

- intensity ratio

422.2nm

Big. Lines are engraved on the fixed slit plate

422.5nm

, but its intensity is small and there is interference.

Sm446.734nm

- is the standard exit slit on the fixed slit plate, the intensity of the line is large.

Rare earth elements have few emission lines, which are weak compared to other elements, and interfere with each other (which always exists in the optical emission spectrum), further reducing the possibility of selection. Most good rare earth elements are very close (this is a special problem with spectrophoto focal planes). Line selection is quite difficult, but the above lines are a good choice.

The Metal Material Element Analyzer photoelectric direct reading spectrometer is capable of analyzing the tantalum series elements in steel. Rare earth elements of all other elements in the steel can be analyzed simultaneously without special parameters and source conditions.