Journal
APPLIED OPTICS
Volume 49, Issue 13, Pages C87-C94Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.49.000C87
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Funding
- MPB Technologies Incorporated
- Natural Sciences and Engineering Research Council of Canada
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Water contaminated with toxic heavy metals can be a great risk to humans. Laser-induced breakdown spectroscopy (LIBS) is a promising candidate to monitor heavy metals in aqueous solutions on site, but the sensitivity is still a major problem. To perform sensitive analysis of analyte metals in aqueous solutions with LIBS, a thin wood sample substrate was used as a liquid absorber to transform the liquid sample analysis to a solid sample analysis. We focus on investigating the performance of this technique using different laser wavelengths (266, 532, and 1064 nm) with a low pulse energy (<5 mJ) and a different number of shots (from 10 to 1000). We demonstrate that a limit of detection of 30 ppb can be achieved using low energy pulses with a 1000 shot accumulation. This technique provides a potentially simple approach for a portable micro LIBS system to monitor water samples. (C) 2010 Optical Society of America
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