(545as) Detection of Metallic Ions in Solution Using Optical Emission Spectroscopy of Plasma Driven By Bipolar Pulsed Power Sources
AIChE Annual Meeting
2018
2018 AIChE Annual Meeting
Environmental Division
Poster Session: Environmental Division
Wednesday, October 31, 2018 - 3:30pm to 5:00pm
While using repetitive 7500 μs-wide low voltage pre-pulses followed by 100 μs-wide 600 V pulses to ignite plasma in solution consisting of 0.1 M HNO3, 500 ppm Pb, and 250 ppm Na, we observe a low peak current with the application of the pre-pulse. The intensities and ratios of H, Pb, and Na emission lines are varied with different polarity and amplitude of the pre-pulse. The above observations show the modulation of the voltage pulses greatly influences the plasma behavior and therefore its optical emission. This work provides an effective way to tailor the plasma behavior and its optical emission, which could potentially be used as a strategy to obtain more reproducible and sensitive detection of metallic ion in water for analytical purposes.