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Report No.

High sensitive detection of elements in liquid samples by laser-induced breakdown spectroscopy with a liquid jet; Laser remote analysis for next generation nuclear fuel

Oba, Hironori; Saeki, Morihisa; Toshimitsu, Masaaki; Wakaida, Ikuo ; Tanabe, Rie*; Ito, Yoshiro*

We investigated the feasibility of laser-induced breakdown spectroscopy (LIBS) for the determination of elements in a liquid solution in the form of a jet flow and using nanosecond laser pulses. A comparison of LIBS sensitivity between two types of flows for liquid analysis was performed. A pipette nozzle tip was used to create a columnar flow of 520$$mu$$m diameter, whereas a trapezoidal-shaped groove nozzle tip produced an ultrathin sheet flow of 5$$sim$$40$$mu$$m thickness. The limit of detection of Na atoms was estimated to be about 14 ng/mL by use of the columnar flow, whereas 1.1 ng/mL in the case of the sheet flow.



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