S2 PICOFOX, TXRF Spectrometer, Trace Analysis

The S2 PICOFOX is independent of liquid nitrogen and cooling water. With a maximum power consumption of only 180 watts the compact, portable TXRF spectrometer is especially suited for mobile applications. It features:

  • Compact, air-cooled micro focus X-ray tube with metal-ceramics technology
  • Multilayer X-ray optics for beam focusing and monochromatization
  • Latest Peltier-cooled, high resolution XFlash® detector (SDD)

For further specifications, please refer to the brochure.

Working principle

The S2 PICOFOX working principle is based on total reflection X-ray fluorescence (TXRF) analysis:

An air-cooled X-ray tube typically with molybdenum target generates an X-ray beam, which is reduced to a narrow energy range by a multilayer monochromator. The fine beam impinges on a polished sample carrier at a very small angle (< 0.1°) and is totally reflected. The characteristic fluorescence of the sample is emitted and measured in an energy-dispersive X-ray detector. Due to the short distance to the carrier, the fluorescence yield is very high and the absorption by air is very low.

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Working principle of the S2 PICOFOX based on TXRF

Advantages compared to XRF spectrometers

Due to the use of monochromatic radiation and total reflection optics the S2 PICOFOX provides the following benefits:

  • Reduced absorption and scattering effects in the sample matrix
  • Enhanced fluorescence yield
  • Reduced background noise
  • Higher sensitivity to elements present in trace amounts
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