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Supersensitive Detection of Na in Water Using Dual-Pulse Laser-Induced Breakdown Spectroscopy

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Abstract

Laser-induced breakdown spectroscopy has been applied to detect Na in water. Laser- induced breakdown was formed by dual-pulse and crossed beam Nd:YAG lasers on a water film. To improve the detection sensitivity, fluorescence intensity dependence on timing between laser pulses, delay time of fluorescence detection timing, gate width of fluorescence detection period, and laser energy were investigated. Under the optimized conditions, the detection limit of Na in water was achieved in the range of 0.1ppb. The developed system is applicable for quick and supersensitive detection of Na atoms in water.

© 2002 Optical Society of America

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