2015
Feasibility of iodine determination in pellets with Laser-Induced Breakdown Spectroscopy
VITEŠNÍKOVÁ, Anna, Aleš HRDLIČKA, Karel NOVOTNÝ, Viktor KANICKÝ, Jozef KAISER et. al.Základní údaje
Originální název
Feasibility of iodine determination in pellets with Laser-Induced Breakdown Spectroscopy
Autoři
VITEŠNÍKOVÁ, Anna (203 Česká republika, domácí), Aleš HRDLIČKA (203 Česká republika, garant, domácí), Karel NOVOTNÝ (203 Česká republika, domácí), Viktor KANICKÝ (203 Česká republika, domácí), Jozef KAISER (203 Česká republika), Jan NOVOTNÝ (203 Česká republika), David PROCHAZKA (203 Česká republika), Lucia SLÁDKOVÁ (703 Slovensko) a Pavel POŘÍZKA (203 Česká republika)
Vydání
8th Euro-Mediterranean Symposium on Laser Induced Breakdown Spectroscopy, 2015
Další údaje
Jazyk
angličtina
Typ výsledku
Konferenční abstrakt
Obor
10402 Inorganic and nuclear chemistry
Stát vydavatele
Rakousko
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Kód RIV
RIV/00216224:14740/15:00085382
Organizační jednotka
Středoevropský technologický institut
Klíčová slova anglicky
laser; induced; breakdown; spectroscopy; iodine; pellets; nanoparticles;
Příznaky
Mezinárodní význam
Změněno: 16. 2. 2016 15:25, doc. Mgr. Karel Novotný, Ph.D.
Anotace
V originále
The work is based on iodine detection in pressed pellets using LIBS. Generally, detection of halogens using such method has been regarded challenging1. For this study a double pulse (DP)-LIBS system was employed. It consists of a Nd: YAG 266 nm ablation laser and a Nd: YAG 1064 nm re-excitation laser, both arranged in orthogonal configuration. The mail goal was to compare different types of binders, non-conductive and conductive ones. From the first category, frequently used microcellulose and from the second one silver powder was used. We focused on the influence of the binder on sensitivity and changes in set of accessible lines of iodine. The observed iodine atomic and ionic lines fall to interval of 500-600 nm. Iodine emission was measured at LIBS of potassium iodide and potassium iodite salts mixed and pressed with a binder. The iodine content was in the range of several percents. Secondly we studied effect of nanoparticles on emission intensity enhancement. As previous studies proved2 Nanoparticle Enhanced Laser Induced Breakdown Spectroscopy (NELIBS) can increase the emission of some lines. Based on theoretical knowledge we assumed effect of a conductive binder on intensification of analytical signal at least in the presence of nanoparticles. The yielded results indicate that the intensification of the iodine signal depends not only on the nanoparticle presence but also on selected line, iodine matrix and the used binder. High excitation energies of iodine ionic lines, easy excitation of silver and different ablation rates of cellulose and silver play an important role. Careful selection of the above mentioned parameters can lead to sensitivity increase but also signal depression can occur when inappropriate conditions are applied.
Návaznosti
ED1.1.00/02.0068, projekt VaV |
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