High-Precision and High-Resolution X-ray Fluorescence Analysis System for Chlorine Elements Based on Double-Curved...

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Materials Science

Background:

• Elemental interference, especially between neighboring elements, is a significant challenge in X-ray fluorescence (XRF) spectroscopy.
• Accurate elemental analysis is crucial in various industries, including petroleum product quality control.

Purpose of the Study:

• To design and evaluate a novel wavelength-dispersive optical system utilizing double-curved crystal (DCC) technology.
• To overcome interference issues and improve the detection limits for specific elements, such as chlorine (Cl), in complex matrices like oil products.

Main Methods:

• A multi-faced double-curved crystal (DCC) optical system was designed.
• A Johann-type graphite curved crystal was employed for monochromatic excitation light focusing.
• A logarithmic spiral graphite curved crystal was utilized for collecting target fluorescence, specifically Cl at 2.62 keV.

Main Results:

• The DCC-based wavelength dispersion device achieved a chlorine detection limit of 0.18 parts per million (ppm) in oil products.
• The device demonstrated good stability, with a detection range of 0.38 ppm for a 1 ppm standard sample.
• The DCC technology effectively eliminated the interference of high sulfur (S) concentrations on chlorine detection.

Conclusions:

• The developed DCC-based wavelength dispersion system significantly enhances XRF analysis accuracy by mitigating elemental interference.
• This technology offers a robust solution for precise chlorine quantification in oil products, crucial for quality and regulatory compliance.
• The DCC approach provides a stable and sensitive method for elemental analysis in challenging sample matrices.