HIGH-SENSITIVITY SODIUM MONITORING APPARATUS

Japanese Patent JP3305174

B2

PROBLEM TO BE SOLVED: To obtain a high-sensitivity sodium monitoring apparatus by which sodium in secondary cooling water or the like can be monitored in real time and stably for many hours by using a tunable soild-state laser as a light source, exciting a sample inside an atomization part, and processing excited atomic fluorescence with a detection part.
SOLUTION: A light source part 10 which is provided with variable wavelength elements 13-1, 13-2 composed of a titanium sapphire crystal, with a YAG laser 11 which irradiates the elements with exciting light and with BBO crystals 14-1, 14-2 which waveform-convert an oscillation laser beam by a nonlinear effect is used. Then, a sample 21 is excited inside an atomization part 20, atomic fluorescence is processed by a detection part 30, and the concentration of sodium inside the sample 21 is measured with high accuracy. At this time, the sample 21 is atomized by a nebulizer 22, it is introduced into a microwave plasma inside a Beenakker cavity 23 accompanying He gas as an assistant gas, the sample 21 is atomized so as to be excited by a laser beam 15, and fluorescence is emitted. The fluorescence is detected 30 and monitored 40.

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Shigeyuki Tomonaga
Jun Izumi
Takashi Morimoto

JP28692595A

July 22, 2002

November 06, 1995

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MITSUBISHI HEAVY INDUSTRIES,LTD.

G01N21/64; G01N21/01; G01N21/74; (IPC1-7): G01N21/64; G01N21/01

JP7128232A
JP63273046A
JP7263780A
JP7260679A
JP7159318A

Toshiro Mitsuishi (2 outside)

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