Influence of easily ionised elements on the delayed responses of the emission intensities of an analyte in a powdermodulated U-shaped argon stabilised DC arc plasma with an aerosol supply
| Autor: | Kuzmanović Miroslav M., Savović Jelena J., Pavlović Mirjana S., Stoiljković Milovan M., Antić-Jovanović Ankica, Marinković Momir |
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| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | Journal of the Serbian Chemical Society, Vol 70, Iss 8-9, Pp 1033-1040 (2005) |
| Druh dokumentu: | article |
| ISSN: | 0352-5139 1820-7421 |
| DOI: | 10.2298/JSC0509033K |
| Popis: | The current of a U-shaped argon stabilised DC arc was square modulated with a 40 Hz repetition frequency between 6 and 3 A. The delayed line intensity responses to the modulation of the arc current were investigated using calcium as a representative analyte. The intensities of both the atomic and ionic lines were monitored at different distances from the arc axis in the presence of various concentrations of the easily ionised element. Temporal evolutions were monitored on a millisecond time scale. It was found that the responses of the line intesity to the arc current change strongly depended on the observed radial position, especially in the vicinity of the arc axis. The obtained results showed a significant influence of even small amounts of the easily ionised element on the excitation and transport of the analyte and indicated a way of possibly improving the analytical capabilities of the excitation source. |
| Databáze: | Directory of Open Access Journals |
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