X-ray fluorescence spectrometer can be applied to cement, steel, building materials, petrochemical, non-ferrous, silicate, coal, kaolin, refractory materials, scientific research, environmental protection and other industries. It is a medium-sized, economical and high-performance spectrometer. The fixed channel is used to reduce the measurement time; the fixed channel is especially suitable for the determination of light elements and trace elements with low fluorescence yield to improve the analysis accuracy and sensitivity. The X-ray fluorescence spectrometer is equipped with intelligent software that is easy to operate and user-accustomed to provide fully automated analytical operations for fast qualitative, quantitative analysis and semi-quantitative analysis.
X-ray fluorescence spectrometers generally have the following three-point analysis mode:
1, point analysis
The electron probe is immobilized on the point of interest of the sample for qualitative or quantitative analysis. The method is used for compositional analysis of microstructures, for example, analysis of material grain boundaries, inclusions, precipitates, precipitates, singular phases, and composition of non-stoichiometric materials.
2, line analysis
When the electron beam is scanned along an analysis line (or a sample scan), a line profile of the change in element content can be obtained. If the sample is compared with the sample topography (secondary electron image or backscattered electron image), the distribution of the elements in different phases or regions can be visually obtained. The component is measured point by point along the line of interest, and the compositional variation curve of the line can also be drawn.
3, surface analysis
When the electron beam is scanned on the surface of the sample, the distribution of the element on the surface of the sample can be displayed on the CRT as a luminance distribution (qualitative analysis). The brighter the brightness, the higher the element content. This method is commonly used to study impurities, phase distribution and elemental segregation in materials. The surface distribution is often compared with the topography.
The point, line and surface analysis methods have different uses and different detection sensitivities. The sensitivity of fixed point analysis is the highest, and the sensitivity of surface scanning analysis is the lowest.
The X-ray fluorescence spectrometer has the following advantages:
1. The analysis speed is high, and the measurement time is related to the measurement precision, but generally it is very short, and all the elements to be tested in the sample can be measured in 2 to 5 minutes.
2. The X-ray fluorescence spectrum is independent of the chemical bonding state of the sample, and has basically nothing to do with the state of solid, powder, liquid, crystalline, amorphous, and the like. However, in the high-resolution precision measurement, there are phenomena such as wavelength changes. Especially in the ultra-soft X-ray range, this effect is more significant.
3, non-destructive analysis: in the measurement will not cause a change in the chemical state, there will be no sample scattering phenomenon. The same sample can be measured repeatedly and the results are reproducible.
4. X-ray fluorescence spectrometer analysis is a physical analysis method, so it can also be analyzed for elements that are chemically related to the same family.
5. The analytical precision of the X-ray fluorescence spectrometer is high.
6, the sample preparation is simple, solid, powder, liquid samples, etc. can be analyzed.
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