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- W2606379427 abstract "Plasma pencil has been employed as an alternative excitationsource for atomic emission spectroscopy determination ofelemental contents in solutions [1, 2]. The new arrangement ofthe discharge tube enables to measure spectra from the freedischarge end without shielding by the quartz wall. Mostintensive atomic spectra can be recorded as close as possibleto the ground electrode but it is also possible to record theplasma tip radiation in the range of about 0-10 mm from theground electrode or as long as the discharge tip is formedbehind the ground electrode. The pencil sustainability andstability were tested under various operating conditions.Carrier gas and plasma gas flow rates as well as forwardedpower were changed and spectra of selected elements wererecorded in order to yield best signal to backgroud ratio anddischarge stability. It has been found that intensities of someatomic lines increase with decreasing plasma gas flow rate,increasing carrier gas flow rate and slightly with increasingforwarded power up to 180 W in continuous mode. The pulsed modehas not been tested [2]. As in our previous studies elements offirst two groups of the periodic table, zinc and copper weretested. In some cases the sensitivity increased by one order ofmagnitude. Calibration dependences in the range of 0.1 – 10 mg× L-1 were then measured. Also matrix effects similar to thosein the previous arrangement were observed. On the other hand,electronic excitation temperature from argon atomic lines,rotational temperature from OH lines and electron numberdensity do not significantly change as a result of mixing argonwith ambient air. Matrix effects by alkali salts were alsoobserved but not eliminated under any operating conditions.Preliminary experiments rather show that the relative decreaseof the analyte lines intensities in presence of an alkali saltis preserved." @default.
- W2606379427 created "2017-04-28" @default.
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- W2606379427 date "2016-03-31" @default.
- W2606379427 modified "2023-09-24" @default.
- W2606379427 title "Analytical and technical aspects of free discharge end ofplasma pencil" @default.
- W2606379427 hasPublicationYear "2016" @default.
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