Consideration on excitation mechanisms in a high-power two-jet plasma

Zaksas, N. P.; Gerasimov, V. V.

doi:10.1016/j.sab.2013.06.013

Cited by 8 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…for Mg ions [6,7]). Recent experimental studies [22] showed, however, a negligible effect of Ar on line intensities of metal atoms with ionization energy below 8 eV. This justifies the predominant role of excitation of Fe by electron impact in the model.…”

Section: Collisional-radiative Model For Iron Atomsmentioning

confidence: 67%

A collisional-radiative model of iron vapour in a thermal arc plasma

Baeva

Uhrlandt

Murphy

2017

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Section: Collisional-radiative Model For Iron Atomsmentioning

confidence: 67%

A collisional-radiative model of iron vapour in a thermal arc plasma

Baeva

Uhrlandt

Murphy

2017

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

“…Although the plasma temperature in the observation zone is about 6000 K (atomic excitation temperature), 32,33 the decrease in element concentrations in rice may occur because of its incomplete evaporation and/or atomization since the residence time of the sample in the excitation zone is very short. A 1.5-fold decrease in the Zn concentration in maize can be explained by excitation mechanisms in the plasma.…”

Section: Analysis Of Starch-containing Plantsmentioning

confidence: 99%

Solid Sampling in Analysis of Various Plants Using Two-Jet Plasma Atomic Emission Spectrometry

Zaksas

2019

Appl Spectrosc

Self Cite

View full text Add to dashboard Cite

The possibility of two-jet plasma atomic emission spectrometry for analysis of different plants using solid sample preparation and unified calibration samples was investigated. The certified reference materials of wheat, maize, rice, potato, grass mix, birch leaves, and Elodea canadensis were used for analysis. On the basis of the behavior of these plants in the plasma, they were divided into two groups: starch-containing materials (cereal and root crops) and leaves/grass. It was found that the previous sample carbonization should be used for analysis of starch-containing plants while leaves and grass could be analyzed by the direct technique. Carbonization was only applied for determining low concentrations of trace elements in leaves and grass. The calibration samples based on graphite powder and simple sample preparation, dilution of powdered sample with a spectroscopic buffer, were used for both direct analysis and analysis after carbonization. Such an approach allowed estimation of B, Ba, Be, Cd, Co, Cr, Cu, Ga, Fe, Mn, Ni, Pb, Si, Sr, V, and Zn in different plants. The limits of detection (LODs) provided by the direct technique were at the level of (µg·g−1): n × 0.1 for Cd, Cu, and Mn; n for B, Ba, Co, Cr, Fe, Ga, Ni, Pb, Sr, V, and Zn; n × 10 for Si. Carbonization allowed improving LODs of elements several times depending on the thermal stability and mineral composition of plants. The LODs of elements in plants obtained after carbonization are the following (µg·g−1): n × 0.01 for Be, Cd, Cu, and Mn; n × 0.1 for Co, Cr, Fe, Ga, Ni, Pb, Sr, V, Zn; and n for Si. The techniques suggested are fast, easily workable, and do not require harmful chemical reagents. In some cases, the influence of variable matrices and different element species on analytical signal of elements was not completely suppressed; the deviation of element concentrations from the true values was discussed.

show abstract

“…To solve the problems appearing in the analysis, it is important to have an idea about the processes occurring in the plasma. The probable mechanisms of an atom and ion excitation in the TJP were investigated [16,18]. The Boltzmann distribution of excited energy levels for Fe atoms and singly ionized ions was found to take place in both analytical regions, which indicates the predominant excitation of atoms and ions by electron impact.…”

Section: Excitation Mechanismsmentioning

confidence: 99%

Minor and Trace Elements in Whole Blood, Tissues, Proteins and Immunoglobulins of Mammals

Zaksas¹,

Nevinsky²

2018

Trace Elements - Human Health and Environment

Self Cite

View full text Add to dashboard Cite

Microelements play different important roles in many physiological processes in all biological systems in both normal physiological and pathological conditions. They take part in the transport of nutrients and gases, support temperature, acid-base balance, homeostasis of the human organisms, maternal and child mental health, the functioning of enzymes, protein and DNA syntheses, cytoskeleton activation, etc. We have performed simultaneous determination of a number of minor and trace elements in whole blood and tissues of mammals by two-jet plasma atomic emission spectrometry (TJP-AES). TJP-AES allows direct analysis of powders without wet acid digestion and can be used for analysis of both large and small amount of the sample, which is important for biomedical investigations with humans and experimental animals. In addition, a content of different elements in preparations of human immunoglobulins was estimated by TJP-AES as well as using different physicochemical methods, the functional role of metal ions in antibodies functioning was analyzed. The analysis of the relative activity of antibodies with catalytic activity (abzymes) in the hydrolysis of DNA, RNA, proteins, peptides and oxidation-reduction reactions and the role of metal ions in the catalysis of these reactions by abzymes were carried out.

show abstract

Consideration on excitation mechanisms in a high-power two-jet plasma

Cited by 8 publications

References 20 publications

A collisional-radiative model of iron vapour in a thermal arc plasma

A collisional-radiative model of iron vapour in a thermal arc plasma

Solid Sampling in Analysis of Various Plants Using Two-Jet Plasma Atomic Emission Spectrometry

Minor and Trace Elements in Whole Blood, Tissues, Proteins and Immunoglobulins of Mammals

Contact Info

Product

Resources

About