Portable total reflection X-ray fluorescence spectrometer for nanogram Cr detection limit.

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Materials Science

Background:

• Portable analytical instruments are crucial for in-situ elemental analysis.
• Total reflection X-ray fluorescence (TXRF) offers high sensitivity for trace element detection.
• Existing TXRF systems can be bulky and require significant power.

Purpose of the Study:

• To develop a compact and portable total reflection X-ray fluorescence spectrometer.
• To demonstrate the feasibility of using low-power X-ray sources for elemental analysis.
• To achieve sensitive detection limits for trace elements in a portable format.

Main Methods:

• Construction of a portable spectrometer integrating an X-ray tube, waveguide slit, detector, and sample carrier.
• Utilizing continuum X-rays from a 1.5-W X-ray tube for X-ray fluorescence excitation.
• Employing a quartz optical flat as the sample carrier within an attache case-type enclosure.

Main Results:

• A functional portable total reflection X-ray fluorescence spectrometer was successfully assembled.
• The system demonstrated effective excitation of X-ray fluorescence using a low-power X-ray source.
• A minimum detection limit for chromium (Cr) in the nanogram range (10^13 atoms/cm2) was achieved.

Conclusions:

• Portable TXRF spectrometers can be realized using low-power components.
• The developed instrument is suitable for trace elemental analysis in various settings.
• This technology enables sensitive elemental detection outside traditional laboratory environments.