研究目的
To improve the cutting efficiency in the FT-TIMS particle analytical technique by using a laser microdissection system for isolating fission track stars and to study the background interference of track detectors in determining isotopic ratios.
研究成果
The laser microdissection system effectively improved the FT-TIMS particle analytical technique by enhancing cutting efficiency and reducing background interference, leading to more precise uranium isotopic measurements.
研究不足
The study highlights the difficulty in cutting collodion film compared to PC film by UV laser and the influence of background interference when determining uranium isotopic ratios of uranium-bearing particles.
1：Experimental Design and Method Selection:
The study employed a laser microdissection system to isolate fission track stars and improve the FT-TIMS particle analytical technique.
2：Sample Selection and Data Sources:
Uranium-bearing particles in swipe samples collected from nuclear facilities were analyzed.
3：List of Experimental Equipment and Materials:
Laser Capture Microdissection System (Arcturs, Life Technologies Corporation, USA), Thermal Ionization Mass Spectrometry (Triton Plus, Thermo Fisher, USA), Polycarbonate (PC) Film (LEXAN 8B35, GE), Collodion, isopropanol, BV-III grade nitric acid, Isoamyl acetate.
4：Experimental Procedures and Operational Workflow:
Samples were prepared, irradiated, etched, and then cut using the laser microdissection system. Uranium isotopic ratios were determined by TIMS.
5：Data Analysis Methods:
The uranium isotopic ratios were analyzed to assess the efficiency and precision of the laser microdissection system in improving the FT-TIMS technique.
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