2025
Investigation of time-resolved OES for trace element analysis: ICCD study on volume DBD / APGD plasma sources
ČECH, Jan; Zdeněk NAVRÁTIL a Jan KRATZERZákladní údaje
Originální název
Investigation of time-resolved OES for trace element analysis: ICCD study on volume DBD / APGD plasma sources
Autoři
Vydání
6th European Conference on Plasma Diagnostics, Praha, Česká republika, 2025
Další údaje
Jazyk
angličtina
Typ výsledku
Konferenční abstrakt
Obor
10305 Fluids and plasma physics
Stát vydavatele
Česká republika
Utajení
není předmětem státního či obchodního tajemství
Označené pro přenos do RIV
Ne
Organizační jednotka
Přírodovědecká fakulta
Klíčová slova česky
ICCD; DBD; APGD; optická emisní spektroskopie; stopové prvky
Klíčová slova anglicky
ICCD; DBD; APGD; OES; trace element
Příznaky
Mezinárodní význam
Změněno: 20. 3. 2026 19:34, doc. Mgr. Jan Čech, Ph.D.
Anotace
V originále
Various pulsed plasma sources have been investigated for their use in trace element analysis, including configurations based on dielectric barrier discharges (DBD) and so-called atmospheric pressure glow discharges (APGD) combined either with liquid sampling (liquid electrode), or with gaseous analyte introduction via hydride generation (HG). (Note: The APGD nomenclature has been given also to homogenous regime of volume DBD, which is not the case here.) In this contribution, the atomizers based on volume DBD and APGD were operated in Ar at atmospheric pressure with analyte introduction in the gas phase by HG. Model analytes included both atoms (Hg, Cd) and molecules - hydrides (AsH3, SeH2, CH3HgH). Molecules were atomized and free atoms subsequently electronically excited in the discharge to be detected by optical emission spectroscopy (OES). The phase-locked diagnostics using ns-gated intensified CCD camera (Andor iStar DH340T-18F-03) mounted on monochromator (Andor Shamrock 750) revealed the delayed temporal evolution of spectral constituents. The OES of low-intensity signals represents a challenging task considering the low signal-to-noise ratio. Photomultiplier-based single-photon-counting techniques (SPC) have been developed to reach the ultimate sensitivity. The possibilities of ICCD-based (SPC) spectroscopy are evaluated here.
Návaznosti
| GF23-05974K, projekt VaV |
| ||
| LM2023039, projekt VaV |
|