Preparation for X-ray Fluorescence Analysis

With X-ray fluorescence analysis (XRF) all elements from boron to uranium can be determined with high precision.
Compared to other analytical methods, XRF offers a wide range of methodological advantages:

  • Non-destructive sample preparation
  • High sample throughput
  • Rapid data information
  • No environmental contamination
  • Customised chemical analysis
  • Highest quality and reproducibility standards

According to customer’s requirements, X-ray fluorescence analysis can be carried out qualitatively, semi-quantitatively or quantitatively.

This method can perfectly be used to check materials for RoHS conformity.

Principles of X-ray Fluorescence Analysis

High insensitive X-rays are used to excite the characteristical radiation.

Due to the influence of primary high-energy radiation (A) on the sample (P), the electrons are also ejected from the inner shell. The adjustment of the electron shells to the new energy state leads to the formation of secondary radiation or X-ray fluorescence radiation. The latter leads through blendings (B) and collimators (S) via an analysing crystal (K) to the scinitillation counter (Z) or to the counting tube (F).

At the analysing crystal, X-rays of the same wavelength are deflected to the detectors (Z, F) in a certain angle. Since the angle of deflection depends on the wavelength of the X-rays, X-rays of different wavelength can be measured by changing the angular size. The wavelength of the secondary radiation is characteristic for each element. Consequently, the wavelength-dispersive X-ray fluorescence analysis (XRF) can be used to identify all elements from boron to uranium (atomic number 5 to 92).

Sample Material for X-ray Fluorescence Analysis

The area of application of X-ray fluorescence analysis (XRF) is multifarious. It ranges from solid samples over liquid samples to pasty substances:

Solid Samples Liquid Samples Pasty Substances

Solid samples

  • Rocks and soils
  • Glass and glass primary products
  • Metals, metal alloys and slags
  • Ceramic, refractory materials
  • Filter dust, ashes
  • Synthetics
  • Basic Materials
  • Foods, medication

Liquid samples

  • Oils
  • Waters
  • Corrosives
  • Acids

Pasty substances

  • Sewage sludge
  • Fats
  • Paint
  • Waxes
  • Varnishes

X-ray Fluorescence Analysis Terrachem GmbH

Terrachem GmbH has been offering X-ray fluorescence analysis for more than 25 years. As a result, our analytical laboratory has many years of experience and a competent analytical team. Learn more about the important fields of application of XRF such as the check for RoHS conformity.