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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper CH_7_5

Detailed analysis of laser-induced breakdown spectroscopy of single particles using electrodynamic balance trapping

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Abstract

Laser-induced breakdown spectroscopy (LIBS) analysis of aqueous samples suffers reduced sensitivity and reproducibility due to matrix effects. [1] The matrix effects can be avoided by measuring a single droplet, but hitting the small droplet with a focused laser pulse in a reproducible way is difficult. Recently, a LIBS technique utilizing electrodynamic balance (EDB) [2] –technology to levitate single water droplet in a stable position was introduced. [3] EDB-LIBS technique allows to preconcentrate the sample by evaporating the water content while the droplet is trapped in the electric field for 5 – 15 seconds. Impurities are not evaporated and the remaining dry particle containing the impurities can be analysed using LIBS with unprecedented sensitivity. Typical limit of detection for various metal impurities was found to be at the level of 10 – 100 µg/L in the original liquid.

© 2015 IEEE

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