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@article{1374172,
author = {Dvořáková, Magda and Hrdlička, Aleš and Slavíček, Pavel and Kanický, Viktor and Otruba, Vítězslav},
article_location = {Cambridge},
article_number = {10},
doi = {http://dx.doi.org/10.1039/c6ja00215c},
keywords = {ATOMIC-EMISSION-SPECTROMETRY; CAPACITIVELY COUPLED PLASMA; MULTIELEMENTAL DETERMINATION; ICP-AES; MICROTORCH; IONIZATION; EXCITATION; DISCHARGE; ANALYTE; CA},
language = {eng},
issn = {0267-9477},
journal = {Journal of analytical atomic spectrometry},
title = {Effects of easily ionisable elements on copper and zinc lines excited in a plasma pencil},
url = {http://pubs.rsc.org/en/Content/ArticleLanding/2016/JA/C6JA00215C#!divAbstract},
volume = {31},
year = {2016}
}
TY - JOUR
ID - 1374172
AU - Dvořáková, Magda - Hrdlička, Aleš - Slavíček, Pavel - Kanický, Viktor - Otruba, Vítězslav
PY - 2016
TI - Effects of easily ionisable elements on copper and zinc lines excited in a plasma pencil
JF - Journal of analytical atomic spectrometry
VL - 31
IS - 10
SP - 2031-2036
EP - 2031-2036
PB - Royal Society of Chemistry
SN - 02679477
KW - ATOMIC-EMISSION-SPECTROMETRY
KW - CAPACITIVELY COUPLED PLASMA
KW - MULTIELEMENTAL DETERMINATION
KW - ICP-AES
KW - MICROTORCH
KW - IONIZATION
KW - EXCITATION
KW - DISCHARGE
KW - ANALYTE
KW - CA
UR - http://pubs.rsc.org/en/Content/ArticleLanding/2016/JA/C6JA00215C#!divAbstract
L2 - http://pubs.rsc.org/en/Content/ArticleLanding/2016/JA/C6JA00215C#!divAbstract
N2 - The influence of Easily Ionizable Elements (EIE) (chlorides of Na, K, Mg, Ca, Sr and Ba) on the measured spectral lines intensities of copper and zinc excited in a capacitively coupled tubular discharge, known as a plasma pencil, is described. A strong decrease was observed in the dependence on the concentration of the EIE. The decrease is not linear. Addition of NaCl, KCl or BaCl2 causes a steep decrease of the copper or zinc signal for a relatively narrow range of 0.05-0.80 g l(-1). Other EIE, with relatively higher ionization energies, even caused an increase of the Cu I 324.754, 327.396, 510.554 and 578.213 nm and Zn I 213.856, 468.014, 472.216 and 481.053 nm signals. Higher EIE concentrations, up to 4 g l(-1), bring only moderate signal suppression or even a weak signal increase. Atoms of Mg, Ca and Sr likely undergo preferential partial ionization but less than Na, K and Ba so that Cu and Zn atoms do not have enough energy for their ionization but still have enough energy for excitation. More Cu and Zn excited atoms, instead of ions, are then available and stronger Cu and Zn atomic emission is measured. Atoms of Na, K and Ba are so much ionized that Cu and Zn atoms even loose energy for their excitation. A stronger decrease was found for the copper line than for the zinc line. An explanation can be done through inelastic collisions between Cu and the EIE excited atoms with very similar energetic levels. The influence of the EIE on the plasma properties was also monitored by calculation of excitation (2900 +/- 280) K, rotational temperatures (1000 +/- 160) K and electron number density of (4.6 +/- 0.7) x 10(19) m(-3); but no significant change was observable.
ER -
DVOŘÁKOVÁ, Magda, Aleš HRDLIČKA, Pavel SLAVÍČEK, Viktor KANICKÝ a Vítězslav OTRUBA. Effects of easily ionisable elements on copper and zinc lines excited in a plasma pencil. \textit{Journal of analytical atomic spectrometry}. Cambridge: Royal Society of Chemistry, 2016, roč.~31, č.~10, s.~2031-2036. ISSN~0267-9477. Dostupné z: https://dx.doi.org/10.1039/c6ja00215c.
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