Micro X-Ray Fluorescence
Bruker M4 Tornado
Micro X-ray Fluorescence spectroscopy is a rapid and non-destructive technique used to acquire quantitative chemical data at high spatial resolution (i.e. µm-scale). Whether small or large, smooth or uneven, the instrument is equipped with a large high-speed stage that supports 2D analysis of virtually any kind of inorganic, organic and liquid samples.
Minimal to no sample preparation is required to produce a variety of 2D element and mineral maps. The large vacuum chamber enables element detection from U to Na. Customisable spot sizes down to 25 µm means that small-scale textural and compositional features can be identified, including those that may not be visibly discernible. Heterogeneous samples are no longer a problem for qualitative and quantitative XRF analysis, with the element maps providing the ability to observe the spatial variation and concentration of major, minor and trace elements across large and small samples.
High Performance micro-XRF with Market-Leading Speed and Flexibility
The M4 TORNADO is the tool of choice for sample characterization using small-spot micro X-ray fluorescence. Its measurements give information about composition and element distribution, even from below the surface. Bruker’s micro-XRF spectrometer is optimized for high-speed analyses of points, lines and 2D area scans (element mapping) of any kind of sample; be it organic, inorganic or liquid.
The primary X-ray excitation uses a polycapillary lens offering small spot sizes and high X-ray intensity. The M4 TORNADO is configurable with a variety of Bruker XFlash® silicon drift detectors (SDD), offering high throughput without compromising energy resolution.
One of the outstanding configuration options of the M4 TORNADO is the additional X-ray tube, which offers a different target material and a collimator changer for extended analytical capabilities.
Further state-of-the-art configuration options:
- He-flush to increase light element performance while maintaining atmospheric pressure in the chamber
- A quick-exchange stage and a geo-sample holder packaged for thin sections and drill cores
- XMethod software for standard-supported and fully standard-based quantification as well as layer thickness calculation
- AMICS software for automated mineral analysis
- Analyse light elements down to carbon with 2 large-area silicon drift detectors
- Faster acquisition with a high throughput pulse processor
- High depth of field for improved focus on topographic samples
- Faster sample changing and set-up with new quick-change stage
- Second X-ray tube with automatic 4-position collimator changer for greater versatility on high energy lines
- Programmable He-purge system for analysing light elements at atmospheric pressure
Detect Super Light Elements
Conventional micro-XRF spectrometers detect elements from sodium upwards. The M4 TORNADOPLUS extends this range to include elements with atomic numbers Z<11, such as fluorine, oxygen, nitrogen and carbon.
There’s no compromise to the performance or sensitivity in the higher energy ranges.
Using two large-area silicon drift detectors with super light element window and a specifically optimized Rh X-ray tube, the M4 TORNADOPLUS is the first Micro-XRF spectrometer ever to enable the analysis of light elements.
This opens up new applications and possibilities for micro-XRF, including:
- Geoscience and mining
- Polymer research
Example: Fluorite and Calcite
There are certain materials that standard micro-XRF systems can’t distinguish between. One such example is fluorite (CaF2) and calcite (CaCO3). They both have calcium as a main component, and what differentiates them is the presence of light elements fluorine and oxygen/carbon. Conventional micro-XRF systems would detect only the calcium, because they can’t detect elements with Z < 11 (sodium).
The new M4 TORNADOPLUS is capable of detecting super light elements with its dual large area detectors and light element X-ray tube. This enables the two minerals to be identified easily, clearly highlighting the fluorine, oxygen and carbon.