The effect of spectral line broadening on the shape of analytical curves obtained using pulsed hollow-cathode lamps for background correction

Larkins, P.L.

doi:10.1016/0584-8547(88)80162-9

Cited by 18 publications

(3 citation statements)

References 28 publications

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“…These results indicate that the HSSR method had the lowest sensitivity and imply that the limiting absorbance values are smaller than those for the D 2 method. As recorded for other elements [ 35 ], the cause of the calibration curve flattening is probably due to the high stray-light levels of the boosted-discharge hollow-cathode lamp. In contrast to the results obtained with the D 2 method, no roll-over (i.e., a decrease of absorbance at high concentrations) occurred for Zn in the extracting solutions with the HSSR method ( Figure 1 ).…”

Section: Resultsmentioning

confidence: 79%

Effects of Iron Concentration Level in Extracting Solutions from Contaminated Soils on the Determination of Zinc by Flame Atomic Absorption Spectrometry with Two Background Correctors

Waterlot

Pelfrêne²,

Douay³

2012

Journal of Analytical Methods in Chemistry

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Zinc and iron concentrations were determined after digestion, water, and three-step sequential extractions of contaminated soils. Analyses were carried out using flame absorption spectrometry with two background correctors: a deuterium lamp used as the continuum light source (D2 method) and the high-speed self-reversal method (HSSR method). Regarding the preliminary results obtained with synthetic solutions, the D2 method often emerged as an unsuitable configuration for compensating iron spectral interferences. In contrast, the HSSR method appeared as a convenient and powerful configuration and was tested for the determination of zinc in contaminated soils containing high amounts of iron. Simple, fast, and interference-free method, the HSSR method allows zinc determination at the ppb level in the presence of large amounts of iron with high stability, sensitivity, and reproducibility of results. Therefore, the HSSR method is described here as a promising approach for monitoring zinc concentrations in various iron-containing samples without any pretreatment.

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Section: Resultsmentioning

confidence: 79%

Effects of Iron Concentration Level in Extracting Solutions from Contaminated Soils on the Determination of Zinc by Flame Atomic Absorption Spectrometry with Two Background Correctors

Waterlot

Pelfrêne²,

Douay³

2012

Journal of Analytical Methods in Chemistry

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“…The reason for this choice is the relatively simple Zeeman pattern and line shape of the Cd resonance line. 2,7,8 The measurements were made with two different experimental configurations. In the first case the plasma jet was freely expanding into open air.…”

Section: Methodsmentioning

confidence: 99%

Application of Zeeman background correction to direct current plasma excited atomic absorption spectroscopy

Oikari

Häyrinen

Hernberg

et al. 2002

J. Anal. At. Spectrom.

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“…(29) Similarly to the Zeeman-effect BC system, the analytical curves show roll-over at high analyte concentrations and ETAAS signals show a dip at very high analyte concentrations. (30,31) The ability of the pulsed-HCL BC system to overcome background interferences in real samples has been demonstrated. Similarly to the Zeeman approach, the pulsed-lamp BC method requires only a single primary source of radiation and single beam optics so that optical alignment is simplified.…”

Section: Analytical Performance and Applicationsmentioning

confidence: 99%

Background Correction Methods in Atomic Absorption SpectrometryUpdate based on the original article by Margaretha T.C. de Loos‐Vollebregt,Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.

Loos-Vollebregt

2013

Encyclopedia of Analytical Chemistry

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Atomic absorption spectrometry (AAS) is based on the absorption of element‐specific primary source radiation by analyte atoms. If part of the radiation is absorbed by molecules or lost owing to scattering, a higher gross absorbance is measured. The difference between the net absorption of the analyte atoms and the measured gross absorbance is called background absorbance . Background absorption and scattering effects have much more serious effects on the results produced in electrothermal atomic absorption spectrometry (ETAAS) than flame atomic absorption spectrometry (FAAS). The amount of incident light deflected or absorbed by nonatomic species must be measured to obtain the correct net absorbance of the analyte atoms only. Perfect background correction (BC) can be obtained only when the background absorbance measurement corresponds exactly in space, time, and wavelength with the atomic absorbance measurement. Since exact coincidence of all three parameters is obviously impossible, it is customary to give priority to the equality in space and to make the difference in time and/or wavelength as small as possible. Although molecular absorption and radiation scattering are both broadband phenomena, there is no spectral range where constant background attenuation can be guaranteed. In all BC systems, two measurements are made. The total or gross absorbance is measured at the wavelength of the atomic absorption line, and the background attenuation is then subtracted to obtain the analyte absorbance. There are several ways in which the nonatomic absorption at the resonance wavelength can be estimated, including continuum‐source (CS) or deuterium‐lamp (D 2 ‐lamp) BC, Zeeman‐effect BC, and pulsed‐lamp or Smith–Hieftje BC correction methods. The principle of each method, the instrumentation, and applications are discussed. D 2 ‐lamp BC is widely used in FAAS and ETAAS. Pulsed‐lamp BC is sometimes used in FAAS but more often in ETAAS. Zeeman‐effect BC is only used in ETAAS.

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The effect of spectral line broadening on the shape of analytical curves obtained using pulsed hollow-cathode lamps for background correction

Cited by 18 publications

References 28 publications

Effects of Iron Concentration Level in Extracting Solutions from Contaminated Soils on the Determination of Zinc by Flame Atomic Absorption Spectrometry with Two Background Correctors

Effects of Iron Concentration Level in Extracting Solutions from Contaminated Soils on the Determination of Zinc by Flame Atomic Absorption Spectrometry with Two Background Correctors

Application of Zeeman background correction to direct current plasma excited atomic absorption spectroscopy

Background Correction Methods in Atomic Absorption SpectrometryUpdate based on the original article by Margaretha T.C. de Loos‐Vollebregt,Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.

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