Title :
Real-time determination of metal concentrations in liquid flows using microplasma emission spectroscopy
Author :
von der Geest, K.B. ; Hyvonen, J. ; Laurila, Tomi
Author_Institution :
Centre for Meas. & Inf. Syst., Univ. of Oulu, Kajaani, Finland
Abstract :
We present a compact and robust analyzer employing micro-plasma emission spectroscopy for real-time determination of metal concentrations in flowing water samples. The analyzer has been characterized by measuring Na, Mn and Ag at mg/L concentrations. The intensity fluctuations of the emission signals have been significantly reduced by applying the Boltzmann plot method to account for variations in the excitation temperature and the number of emitting particles.
Keywords :
alumina; ceramics; electrodes; lattice Boltzmann methods; manganese; microfluidics; plasma diagnostics; plasma temperature; silver; sodium; tungsten; Ag; Al2O3-W; Boltzmann plot method; Mn; Na; ceramic alumina; compact analyzer; emission signal; emitting particle number; excitation plasma temperature; flowing water samples; integrated microfluidic channel; intensity fluctuations; liquid flows; metal concentration; microplasma emission spectroscopy; real-time determination; robust analyzer; tungsten electrodes; Atomic measurements; Cathodes; Density measurement; Dielectrics; Discharges (electric); Fluctuations; Robustness;
Conference_Titel :
Photonics Global Conference (PGC), 2012
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-2513-4
DOI :
10.1109/PGC.2012.6458046
