We have examined the suitability of laser spark spectroscopy as a real-time, in situ continuous monitor for toxic metals. A crucial issue for in situ monitors is the effects of ambient conditions on accuracy. Detailed measurements of the plasma parameters show that the laser-produced spark is remarkably insensitive to ambient conditions such as variations in the background gas, the presence of particles, humidity, and laser power. This is a very positive result for the field use of laser spark spectroscopy to measure toxic metals.
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Yalçın et al. (1996) studied this question.