Thermo Scientific ARL OPTIM’X Series

Significance of the Topic

Wavelength dispersive X-ray fluorescence (WDXRF) is a cornerstone analytical technique for identifying and quantifying elements from boron through uranium in solid and liquid matrices. Its high accuracy, precision and low per-sample cost make it essential for quality control and research across industries including cement, metallurgy, petroleum, polymers and food.

Objectives and Overview

This summary examines the Thermo Scientific ARL OPTIM’X series WDXRF spectrometer. The goal is to highlight its compact design, enhanced X-ray optics and flexible configuration that deliver up to 500 W equivalent performance from a 200 W tube and 200 W performance from 50 W.

Methodology and Instrumentation Used

Analytical principle: sequential and simultaneous WDXRF with Ultra Closely Coupled Optics (UCCO) increasing count rates by up to 210 % relative to conventional geometry. A SmartGonio device enables automated θ/2θ positioning of crystals and detectors, while up to four multichromators support simultaneous measurement of eight elements. Detection modes include flow-proportional counters and scintillation detectors under vacuum or helium.

• Rh anode end-window X-ray tube, 50 kV, 50 W or 200 W generator
• SmartGonio goniometer with Moiré optical encoders for high angular precision
• Temperature-controlled spectrometer chamber for stability
• Sample handling: manual cassette or 13-position autosampler; solids, pellets, beads, liquids and powders
• OXSAS software with UniQuant standard-less analysis and multi-variable regression for calibration

Main Results and Discussion

The OPTIM’X system exhibits outstanding reproducibility and detection limits:

• Sulfur in oils at 50 W: limit of detection 1.4 ppm in 100 s, reproducibility (n=7) average 25.9 ppm, SD 0.58 ppm
• Fluorine in slags at 200 W: repeatability over six runs for 13 oxides, F mean 1.40 % with SD 0.008 %
• Heavy elements in polymers at 200 W (100 s): LOD Ba 2.6 ppm, Cr 0.5 ppm, Ni 0.3 ppm, Pb 0.9 ppm, Zn 0.3 ppm
• Milk powders at 50 W (60 s): LOD Na 20 ppm, Mg 11 ppm, P 4.4 ppm, K 2 ppm, Ca 10 ppm, Fe 2.1 ppm

Benefits and Practical Applications

The ARL OPTIM’X offers:

• Turn-key analyzers for sulfur, cement, slag and general oxide analysis compliant with ASTM/ISO
• Standard-less UniQuant module for rapid screening without certified standards
• Minimal maintenance: no water cooling, no gas supply and small laboratory footprint
• Fast batch throughput with autosampler and fully automated sample preparation integration

Future Trends and Applications

Advancements likely include integration of artificial intelligence for real-time calibration optimization, expanded light-element sensitivity via improved optics, miniature vacuum-free designs for field use and deeper automation linking sample preparation, analysis and data reporting.

Conclusion

The Thermo Scientific ARL OPTIM’X WDXRF spectrometer combines innovative optics, flexible configurations and robust software to deliver high-throughput, high-precision elemental analysis across a broad range of industries. Its compact design and turnkey solutions streamline laboratory workflows while ensuring compliance with international standards.

References

No formal references were provided in the source document.