Since its inception in 1951, Rigaku has been at the forefront of analytical and industrial instrumentation technology.
With Rigaku's vast understanding of X-rays and its complementary technologies as a foundation, our true strength is seen in an unparalleled willingness to collaborate with customers. By promoting partnerships, dialog, and innovation within the global scientific and industrial communities, Rigaku demonstrates a relentless commitment to providing our client markets with fully integrated solutions.
In addition to designing and manufacturing analytical X-ray systems for elemental analysis, materials research and structural investigations, Rigaku is also a leading provider of automation robotics, vacuum feedthrough components, and X-ray optics. Core analytical technologies include X-ray diffraction (XRD), X-ray fluorescence (WDXRF, EDXRF), single crystal X-ray diffraction (protein and small molecule), and small angle X-ray scattering (SAXS).
The Supermini Benchtop WDXRF from Rigaku
Supermini benchtop WDXRF, running at a cool 200 W, is exactly what is necessary for those volatile gasoline and diesel samples. The Supermini has adequate power to get really low detection limits, but the sample will not be heated during the analysis cycle by energy generated from the production of high-energy X-rays. Running the sample under helium atmosphere does not cause significant evaporation under these excitation conditions, and the corresponding change in the sample composition does not occur during the analysis time frame.
Figure 1. Supermini WDXRF
This also means that the conditions for diffusion of the sample through the thin film membrane are decreased, significantly reducing coating of the “window” with sulfur. Sulfur coating of the sample cell’s polymer window can distort its transmissivity, which can be a significant problem with high-powered WDXRF units. This undesirable effect is greatly reduced with the lower-power Supermini, adding to overall measurement stability and accuracy.
Consistency, Repeatability and Reproducibility
This is truly a case of “less is more.” The consistency of repeatability studies and the tight deviations for reproducibility data testify to the fact that the sample integrity during the analysis is maintained and does not become a major contributing factor to the statistical scatter associated with the analysis of sulfur in these volatile substances.
Conducting Daily Sulfur Analysis with The Supermini
The Supermini, with its multi-position sample changer and intuitive software, will become a welcome ally in your daily sulfur analysis routine. It can be set up quickly to perform single sample analyses for your most volatile samples and then set up for unattended analysis on more stable samples while the analyst takes care of more labor-intensive analytical tasks.
Figure 2. Plot of replicate analysis of NIST 2294 - 40.9 mg/kg sulfur over 20 days vs mg/kg sulfur in reformulated gasoline with ASTM D2622-2008 limits (red lines)
Figure 3. Plot of replicate analysis of 10mg/kg sulfur in Diesel over 20 days vs mg/kg sulfur with ASTM D2622-2008 limits (red lines)
Rigaku is able to provide for your analytical needs by configuring its range of powerful, cost-effective spectrometers with tailored analytical procedures to meet your obligations with respect to providing accurate, precise and validated data and helping you keep these systems in specification through their proficiency testing partners.
This information has been sourced, reviewed and adapted from materials provided by Rigaku.
For more information on this source, please visit Rigaku.