Atomic and molecular spectra of vapours evolved in a graphite furnace. Part 1. Alkali halides

Daminelli, G.; Кацков, Д. А.; Mofolo, Rita M.; Tittarelli, Paolo

doi:10.1016/s0584-8547(98)00248-1

Cited by 34 publications

(20 citation statements)

References 16 publications

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“…In Table 2, we see good agreement between the data obtained for the main absorption bands using the quantum chemical calculations in [7] and in our work. The closeness of the calculated and experimental values allows us to say that the absorbing species are diatomic molecules of the corresponding alkali metal halides, while the vapor phase above the salts NaCl, KCl, NaI is a one-component system.…”

Section: Introductionsupporting

confidence: 84%

Taking into account nonselective absorption of light in atomic absorption analysis

2006

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We propose a method for quantitatively taking into account nonselective absorption for systems in which the vapor phase contains a single molecular form: sodium and potassium chlorides and iodides. We identified the absorption bands using modern quantum chemistry methods. We have demonstrated good agreement between the experimental data and the calculations. We have tested the correctness of the method we developed for the example of determining known silicon and iron contents in potassium chloride and sodium iodide. Differences between the results obtained and the true elemental contents were random.Key words: atomic absorption spectrometry with a graphite furnace, nonselective absorption of light, vapor phase, molecular spectra, sodium and potassium iodides and chlorides.

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Section: Introductionsupporting

confidence: 84%

Taking into account nonselective absorption of light in atomic absorption analysis

2006

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“…The diagrams show substantial differences in the composition of atomic and molecular vapor. Apart from atomic lines and broad continuum bands belonging to alkaline chlorides [15], the diagrams show the spectral bands related to AlCl, AlF, MgCl, CS and SiO [5][6][7]13,16].…”

Section: Resultsmentioning

confidence: 99%

Low-resolution continuum source simultaneous multi-element electrothermal atomic absorption spectrometry: steps into practice

Кацков

2015

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…As shown in Figs. 1 and 2, NaCl also caused increase in the background absorption, which is contributed to its vaporization during the atomization step, which leads to a significant molecular absorption (Daminelli et al 1999). Contrary to NaCl, the presence of MgCl 2 is not connected with a significant molecular absorption (Figs.…”

Section: Resultsmentioning

confidence: 99%

Direct electrothermal atomic spectrometric determination of Ag in aqua regia extracts of soils, sediments, and sewage sludge with matrix modification

Urbanová

Husáková

Šrámková

2012

Environ Monit Assess

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Silver is subject to significant interferences caused by high chloride concentrations in electrothermal atomic absorption spectrometry, thus its direct determination in aqua regia leaches from soils, sediments, and sludges is very difficult, especially when using instrumentation equipped with deuterium-lamp background correction (D2). In this study, the interference of the aqua regia medium was successfully eliminated using Pd-citric acid chemical modifier. This chemical modifier was found to be the most advantageous in comparison with Pd mixture with ascorbic acid, tartaric acid, or citric acid-Li based on its ability to suppress the interference originating from different chloride matrix. Palladium increases the analyte stability; citric acid serves as a reducing reagent, and furthermore, it helps to remove the interfering chlorides by forming HCl, in the drying step of the electrothermal program. In the presence of the modifier, the pyrolysis temperature can be adjusted up to 1,000 °C with no loss of the analyte. The obtained limit of detection and characteristic mass were 5 ng g(-1) and 1.7 pg, respectively. The accuracy of the method was verified by means of six different reference samples and by comparing the results of the analysis of real samples with those obtained by inductively coupled plasma orthogonal acceleration time-of-flight mass spectrometer. The proposed method was applied to the Ag determination in soils, sediments, and sewage sludge samples from the Pardubice region in Czech Republic.

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Atomic and molecular spectra of vapours evolved in a graphite furnace. Part 1. Alkali halides

Cited by 34 publications

References 16 publications

Taking into account nonselective absorption of light in atomic absorption analysis

Taking into account nonselective absorption of light in atomic absorption analysis

Low-resolution continuum source simultaneous multi-element electrothermal atomic absorption spectrometry: steps into practice

Direct electrothermal atomic spectrometric determination of Ag in aqua regia extracts of soils, sediments, and sewage sludge with matrix modification

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