High sensitive detection of mixed elements in an aqueous solution by laser-induced breakdown spectroscopy with an ultra thin liquid film

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560068
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Applied physics, general
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: OHBA Hironori 独立行政法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 研究主幹 (60354817)
• Co-Investigator(Renkei-kenkyūsha): SAEKI Morihisa 独立行政法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 研究副主幹 (30370399) ; ITO Yoshiro 国立大学法人長岡技術科学大学, 工学部, 教授 (60176378)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: レーザー / ブレークダウン分光 / プラズマ / 液体薄膜生成 / 高感度分析

Outline of Final Research Achievements

For aqueous-solution-based elemental analysis, we used a thin liquid sheet (μm-scale thickness) in laser-induced breakdown spectroscopy (LIBS). In this study, we developed LIBS methods for a liquid phase to improve detection sensitivity. The hydrodynamics of liquid flow induced by the laser pulse was analyzed by laser flash shadowgraph imaging. Time-resolved observation of the hydrodynamics and plasma emission suggests that the dependence of the signal-to-background ratio on the liquid-sheet thickness is correlated with the volume of flowing liquid that interacts with the laser pulses. The detection of elements in aqueous solutions was performed for Na, Rb, and Cs by using the sheet flow. Present work achieved high-sensitive analysis for alkali metals. And also we performed LIBS measurements with the sheet flow for the simultaneous determination of 14 elements in simulated high-level radioactive waste liquid and discussed the application potential as a tool for onsite monitoring.

Free Research Field

レーザー応用工学